JP4682039B2 - Switchgear - Google Patents

Description

  The present invention relates to a switchgear, and more particularly to a gas-insulated switchgear.

  A cubicle type gas insulated switchgear generally includes a ground breaker and a vacuum valve having a breaker in an insulating medium. One end of the ground disconnector is connected to the vacuum valve, and the other end is connected to the cable via the bus and the bushing. The vacuum valve has one end connected to the ground disconnector and the other end connected to the solid insulated bus via the bus and bushing. The solid-state insulation bus is electrically connected to the adjacent switchboard.

  In this gas-insulated switchgear, a power supply can be supplied by connecting a grounding disconnector to the busbar side and further connecting a breaker to make the busbar and cable conductive.

  When an accident current flows, the bus bar and the cable can be disconnected by disconnecting the ground disconnector after interrupting the interrupter. Furthermore, the cable can be grounded by turning on the breaker after the grounding disconnector is thrown to the grounding side (see, for example, Patent Document 1 and FIG. 52).

JP 2003-333715 A

  In the gas-insulated switchgear described above, the small size and low cost are the major factors for entering the market, as well as the reliability of the operation of turning on / off, disconnecting and grounding in the system.

  However, in this type of gas insulated switchgear, a vacuum valve and a ground disconnector are provided independently. In particular, since the ground disconnector has a grounding part and a disconnecting part, two types of these drive mechanisms and their drive sources are required. As a result, the configuration of the gas-insulated switchgear is becoming complicated, which is an obstacle to miniaturization and cost reduction of the gas-insulated switchgear.

  For this reason, attempts have been made to improve the drive mechanisms of the grounding and disconnecting parts in the grounding disconnector, but the current situation is that the gas-insulated switchgear described above has not been further reduced in size and cost. .

In order to achieve the above object, the first invention is a switching device capable of changing the four states of closing, breaking, disconnecting, and grounding, and includes a fixed side terminal and a movable side terminal that come in contact with and separate from each other. A link mechanism that is buckled by one end being pin-supported and the other end being supported by an operation lever provided on the movable shaft of the movable-side terminal and a pin at the end on the fixed-side terminal side. A vacuum valve that rotates with the pin on the terminal side as a fulcrum, a movable contact provided on the movable side of the vacuum valve, and a fixed contact for busbar provided on one rotational direction side of the movable contact; wherein the grounding fixed contact provided in the other rotational direction side of the movable contactor, and making and breaking operation and for disconnecting operation for the operation unit of the vacuum valve, and the use-on and power-off operation and the disconnection operation for the operating device operating device for connecting the movable terminal of the vacuum valve Characterized by comprising and.

  In order to achieve the above object, the first invention is a switching device capable of changing the four states of closing, breaking, disconnecting, and grounding, and is fixed on the side of contact by a buckling link mechanism. A vacuum valve comprising a terminal and a movable terminal, and rotatably supported with the fixed terminal portion as a fulcrum; a movable contact provided on the movable side of the vacuum valve; and one rotational direction of the movable contact A fixed contact for a busbar provided on the side, a fixed contact for grounding provided on the other rotational direction side of the movable contact, an operation device for closing and disconnecting operation of the vacuum valve, and the input It is characterized by comprising an operating mechanism for connecting the operating device for the disconnecting operation and the disconnecting operation and the movable side of the vacuum valve.

The second invention is an opening / closing device capable of changing the four states of closing, breaking, disconnecting and grounding, comprising a fixed side terminal and a movable side terminal, and rotating around the fixed side terminal portion as a fulcrum. A movably supported vacuum valve, a movable contact provided on the movable side of the vacuum valve, a spring disposed on the movable side of the vacuum valve, and generating a force to open the vacuum valve; a lever one end coupled to the movable shaft of the movable side terminal of the vacuum valve, a support member for restraining the distance of the other end of the fixed-side terminal portion and the lever of the vacuum valve, one of the movable contact A fixed contact for busbar provided on the rotation direction side, a fixed contact for grounding provided on the other rotation direction side of the movable contact, an operation device for closing and operating the vacuum valve, and a disconnection operation An operation device and the operation for the closing operation And wherein the said disconnecting operation for the operation unit further comprising an operation mechanism connected to the other end of the lever with.

Furthermore, the third invention, in the second invention, the operating mechanism includes an operating lever for coupling the other end of the said making and breaking operation for manipulator lever, the disconnection operation for the operation unit and the operating lever And an operation lever that connects the two.

According to a fourth aspect of the present invention based on the second aspect, the operating mechanism is connected to the first operating rod that is linearly moved by the disconnecting operation controller, and is rotatably connected to the first operating rod. A second operating rod imparted with torsional rotation by a closing / blocking operation controller; and the second operating rod so as to convert torsional rotation of the second operating rod into a closing / blocking operation of the vacuum valve; It is characterized by comprising an operation lever for connecting the movable shaft of the vacuum valve .

Furthermore, the fifth invention is an opening / closing device capable of changing the four states of closing, breaking, disconnecting and grounding, comprising a fixed side terminal and a movable side terminal, and rotating around the fixed side terminal portion as a fulcrum. A movably supported vacuum valve, a movable contact provided on the movable side of the vacuum valve, a spring disposed on the movable side of the vacuum valve, and generating a force to open the vacuum valve; engaging pin provided on the movable shaft of the movable side terminal of the vacuum valve, a guide having a guide groove for guiding the engagement pin, fixed contact busbar provided on one rotation direction side of the movable contact connecting a child, and the grounding fixed contact provided in the other rotational direction side of the movable contactor, and an operation unit for making and breaking and rotating operation of the vacuum valve, and the engaging pin and the operating device Features an operation mechanism .

The sixth aspect, in the fifth invention, the guide is the engagement pin, for guiding the circular motion of the movable pin centered on the end of the fixed side terminal of the vacuum valve The guide groove comprising: a first groove for communicating with both ends of the first groove; and a second groove for moving the engagement pin radially inward of the first groove. It is characterized by having.

Further, a seventh invention, in the fifth aspect, the guide, the engagement pin, for guiding the circular motion of the movable pin centered on the end of the fixed side terminal of the vacuum valve The guide groove comprising: a first groove for communicating with both ends of the first groove; and a second groove for moving the engagement pin radially inward of the first groove. provided on one of said second grooves in said guide groove, characterized in that a rotatable transition member having an opening that engages the engagement pin.

  Since the switchgear according to the present invention can perform disconnection and grounding in response to the rotation of a vacuum valve having a blocking portion that is turned on and off, the drive mechanism can be simplified. As a result, a small and low-cost switchgear can be provided.

Hereinafter, embodiments of the opening and closing device of the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of the switchgear according to the present invention. FIG. 1 is a longitudinal side view of the switchgear according to an embodiment of the present invention, and FIG. 2 is an arrow II-II in FIG. FIG. 3 is a cross-sectional view of an embodiment of the switchgear according to the present invention as viewed from the direction of arrows III-III in FIG. 1, and FIG. It is a figure which expands and shows the vacuum valve part which comprises one Embodiment of the switchgear of this invention.
In these drawings, the switchgear includes a protection monitoring device chamber 110 on the upper side of the outer box 100, an operating device chamber 111 below it, and a switcher chamber 112, a cable chamber 113 and a busbar chamber 114 below it. Is arranged.

  The switchgear 112 is provided inside the switchgear chamber 112. This rotary switch 1 can be rotated about one side (right side in FIG. 1) as a fulcrum, and as shown in FIGS. 2 and 3, three current switches for three phases arranged side by side. Vacuum valve 2 (described later in detail), operating device 3 for closing and operating the vacuum valve 2, three disconnecting operation devices 4 for three phases arranged in parallel, vacuum valve 2 and vacuum valve 2 is disposed on the other movable side (the left side in FIG. 1) of the vacuum valve 2, and the operation levers 5 to 8 for connecting the operation controller 3 for the closing operation and the operation controller 4 for the disconnection operation of the vacuum valve 2. A movable contact 9 connected to the movable terminal, a bus-side fixed contact 10 disposed so as to be electrically opened and closed with the movable contact 9, and an electrically opened and closed with the movable contact 9. The grounding side fixed contactor 11 and the like.

  The above-described operating device 3 for closing and operating the vacuum valve 2 and the three operating devices 4 for disconnecting operation corresponding to the three phases are fixed in the operating device chamber 111.

  The bus-bar-side fixed contact 10 is connected to the solid insulated bus 12 in the bus-bar chamber 114. The ground side fixed contact 11 is connected to the ground bus 13. The fixed side terminal 2A on one side of the vacuum valve 2 is connected to the cable head 16 in the cable chamber 113 via a cable side fixed contact 14 and a bushing 15, respectively. Each cable head 16 is connected to a high voltage cable 17. Each high-voltage cable 17 is provided with an instrument current transformer 18.

  The above-described pivotable support structure of the vacuum valve 2 will be described with reference to FIG. 4, the same reference numerals as those in FIGS. 1 to 3 denote the same parts. One side of the vacuum valve 2 is rotatably supported by the cable side fixed contact 14 by a pin 19.

  Insulating support plates 20 are disposed on both sides of the vacuum valve 2. One side of the insulating support plate 20 is rotatably attached to the end of the pin 19. One end of the operation lever 7 and one end of the operation lever 8 are connected to the other side of the insulating support plate 20 by a pin 21. The other end of the operation lever 8 is connected to a movable shaft 23 connected to a movable contact 2 </ b> B in the vacuum valve 2 by an engagement pin 22. A blocking spring 24 is disposed between the engagement pin 22 and the movable contact 9 on the movable shaft 23. In addition, a stopper pin 25 that abuts against the end of the movable shaft 23 is provided at an intermediate portion of the operation lever 8.

With the above configuration, the end portions of the vacuum valve 2 and the operation lever 8 are supported by the insulating support plate 20 by the pins 19 and 21, so that the vacuum valve 2 and the operation lever 8 can be buckled. A simple link mechanism. As a result, the blocking shaft 24 provided on the movable side of the vacuum valve 2 biases the movable shaft 23 and the engagement pin 22 penetrating the movable shaft 23 in the blocking direction of the vacuum valve 2. Then, while the force in the direction in which the overall length is extended in the buckled link mechanism is composed of a vacuum valve 2 operating lever 8 Metropolitan is energized, the distance of the pin 19 and the pin 21, supporting the insulating Since it is restrained by the plate 20, the vacuum valve 2 is urged to rotate counterclockwise around the pin 19 in FIG.

In the process of extending the entire length of the buckled linkages, the stopper pin 25 provided on the operation lever 8 and abuts on an end of the movable shaft 23, the total length of the buckled linkages constrained, No further buckling progresses. In this state, if the operation lever 7 is operated in the left-right direction in FIG. 4, the vacuum valve 2 is kept in the shut-off state. It is rotated around the pin 19.

  In FIG. 4, a lever 26 that regulates a contact position between the movable contact 9 and the bus-side fixed contact 10 of the vacuum valve 2 is provided on one side (left side in FIG. 1) facing the movable side of the vacuum valve 2. It is fixed. On the other side, a hook 27 for restricting the contact position between the movable contact 9 and the ground-side fixed contact 11 of the vacuum valve 2 is rotatably provided. As shown in FIG. 1, a hook operating rod 28 and its operating device 29 are connected to the hook 27.

  In FIG. 1, the connection configuration of the operation levers 5 to 8 for connecting the operating device 3 for closing and operating the vacuum valve 2 and the operating device 4 for disconnecting operation will be described. One end of the operation lever 6 is connected to an intermediate portion of the operation lever 5 connected to the device 3 (in this example, a linear motion type). The other end of the operation lever 6 is connected to the rotating shaft of the disconnecting operation controller 4. A wipe mechanism 30 is provided on the operation lever 5 side of the operation lever 7.

  Next, the operation of the above-described opening / closing device of the present invention will be described with reference to FIGS. FIG. 5 shows the input state of one embodiment of the switchgear according to the present invention, FIG. 6 shows the shut-off state of one embodiment of the switchgear according to the present invention, and FIG. 7 shows one embodiment of the switchgear according to the present invention. FIG. 8 shows a disconnected state, FIG. 8 shows a ground-off state of an embodiment of the switchgear according to the present invention, and FIG. 9 shows a ground-on state of an embodiment of the switchgear of the present invention.

  First, the switching operation from the shut-off state of FIG. 6 to the close-up state of FIG. 5 will be described. In FIG. The operating lever 7 is rotated in the direction of the arrow, but the engagement pin 22 contacts the lever 26, so that the vacuum valve 2 does not further rotate counterclockwise and compresses the blocking spring 24. Then, the vacuum valve 2 is turned on. Further, the wiping mechanism 30 generates a contact force between the contacts of the vacuum valve 2, and the input state shown in FIG. 5 is obtained.

  The switching operation from the on state in FIG. 5 to the on state in FIG. 6 will be described. In FIG. 5, when the on / off operating device 3 of the vacuum valve 2 is operated in the off direction, the operating lever 5 is clockwise in FIG. The control lever 7 is rotated and driven in the direction of the arrow in FIG. As a result, the insulating support plate 20 is rotated clockwise around the pin 19 on the fixed side of the vacuum valve 2 and the cutoff spring 24 extends, so that the vacuum valve 2 is blocked as shown in FIG. At this time, the movable contact 9 is fitted and connected to the bus-side fixed contact 10.

  Next, the switching operation from the shut-off state of FIG. 6 to the disconnection state of FIG. 7 will be described. In FIG. 6, when the operating lever 6 is driven clockwise by the disconnecting operation device 4, the operating lever 7 moves in the direction of the arrow. The vacuum valve 2 is rotated while maintaining the open state. As a result, as shown in FIG. 7, the movable contact 9 provided on the movable side of the vacuum valve 2 and the bus-side fixed contact 10 are disengaged, and a disconnected state is established.

  At this time, as shown in FIG. 4, since the stopper pin 25 provided on the operation lever 8 contacts the end of the movable shaft 23, the movable shaft 23 of the vacuum valve 2 is fixed at the open position. Yes.

  Next, the switching operation from the disconnection state of FIG. 7 to the ground cut-off state of FIG. 8 will be described. In FIG. 7, when the operation lever 6 is further driven clockwise by the disconnection operation controller 4, the operation lever 7 is Driven in the direction of the arrow further than the disconnection position, the vacuum valve 2 further rotates while maintaining the open state. As a result, as shown in FIG. 8, the movable contact 9 provided on the movable side of the vacuum valve 2 is fitted to the ground-side fixed contact 11 to be in a ground-off state.

  In this process, the hook 27 urged clockwise is brought into contact with the engagement pin 22 and driven counterclockwise, but the movable contact 9 is fitted to the ground-side fixed contact 11. When the vacuum valve 2 is rotated until the hook 27 returns to the initial position, the hook 27 engages with the engagement pin 22.

  Next, the case where the vacuum valve 2 is turned on in the ground state shown in FIG. 8 will be described. When the on / off operating device 3 for the vacuum valve 2 is turned on in the ground state shown in FIG. 9 and the operating lever 7 is driven in the direction of the arrow in FIG. 9, but since the engagement pin 22 and the hook 27 are engaged, the vacuum valve 2 is not rotated counterclockwise. Only the lever 8 and the insulating support plate 20 are rotated counterclockwise. Thereby, the vacuum valve 2 is turned on while accumulating the cutoff spring 24.

  At this time, since the movable contact 9 and the ground fixed contact 11 are fitted, the circuit of the cable 17 (not shown) connected to the cable fixed contact 14 is grounded.

  As described above, the operation of breaking, disconnecting, and grounding has been described starting from the input state. However, the operations of grounding, disconnecting, breaking, and closing can be performed by the reverse procedure.

  However, when the operation from the state where the vacuum valve 2 is shut off at the grounding position as shown in FIG. 8 to the disconnection position shown in FIG. 7 is performed, the hook 27 is shown in FIG. It is driven counterclockwise by the hook operating device 29 via the hook operating rod 28 and the hook 27 and the engaging pin 22 are disengaged. Then, the operating lever 6 is counterclockwise operated by the disconnecting operation device 4. Rotate in the direction.

  According to this embodiment, in response to turning on and turning of the vacuum valve, disconnection and grounding can be performed, and in addition, the vacuum valve can be turned on in the grounded state. The operation mechanism can be simplified. As a result, a small and low-cost switchgear can be provided.

  In the above-described embodiment, if a connection lever for three-phase operation is provided on the operation device side of the wipe mechanism 30 for each phase shown in FIG. 2, the operation device for the on / off operation of the vacuum valve 2 shown in FIG. 3, the operation levers 5 and 6, the disconnecting grounding operation controller 4 and the like can be integrated into one system. Thereby, there are effects that the number of parts is reduced and the structure can be further simplified.

FIG. 10 shows another embodiment of the switchgear according to the present invention. In this figure, the same reference numerals as those shown in FIG. 4 denote the same or corresponding parts.
This embodiment omits the hook 27 which is the position restricting means on the ground closing side, the lever 26 which is the position restricting means on the disconnection close side, and the hook operating device 29 in the embodiment shown in FIG. In order to satisfactorily perform the operation of turning on, shutting off, disconnecting, and grounding, the guide 40 is used. The guide 40 is made of an insulator and is fixed in the switch chamber 112 so as to be positioned on both sides of the vacuum valve 2. The guide 40 is provided with a guide groove 41 for guiding and restricting the position of the engagement pin 22.

  The guide groove 41 has an arcuate portion along the locus drawn by the engagement pin 22 when the vacuum valve 2 is rotated around its fixed side while maintaining the shut-off state, that is, the position A (block A groove corresponding to a position B (break / closed ground state) from the disconnection closed state) and a small curved portion in the radial direction continuous to both ends thereof, that is, a position A to a position C (filling / disconnection closed state); It is composed of a portion of the groove corresponding to the position B to the position D (closed / grounded closed state).

  The engaging pin 22 guided in the guide groove 41 connects the movable shafts 23 of the three vacuum valves 2 in this example. One end of an operation lever 42 is connected to the movable shaft 23. The other end of the operation lever 42 is pin-connected to one end of the operation lever 43. The other end of the operation lever 43 is fixedly supported so as to be rotatable. One end of the operation lever 44 is connected to an intermediate portion of the operation lever 42.

  In this example, the engagement pin 22 can be moved to the positions of closing, disconnection, disconnection, and grounding by the engagement between the guide groove 41 of the guide 40 and the engagement pin 22 described above. The other end of the operation lever 44 is connected to a 5-position operation device (not shown).

Next, the operation of another embodiment of the switchgear according to the present invention will be described.
First, when the vacuum valve 2 is in the closing position, the engagement pin 22 of the vacuum valve 2 is at the position C of the guide groove 41 in FIG. At this time, the movable contact 9 provided on the movable side of the vacuum valve 2 and the bus-side fixed contact 10 are fitted to each other so that the disconnection is closed. Further, contact force is applied between the contacts of the vacuum valve 2 by a wiping mechanism (not shown) on the operation mechanism side, and the vacuum valve 2 is in the on state.

  Next, when the operation device is driven and the operation lever 44 is moved upward in FIG. 10, the operation lever 42 is moved leftward, so that the engagement pin 22 is moved to the position A of the guide groove 41. Moving. As a result, the vacuum valve 2 is shut off while maintaining the state where the movable contact 9 and the bus-side fixed contact 10 are fitted, that is, the disconnection is closed.

  Further, when the engaging pin 22 is driven to the position E of the guide groove 41 through the operating levers 44 and 42 by driving the operating device, the vacuum valve 2 is rotated to the disconnecting position while maintaining the shut-off state. The movable contact 9 and the bus-side fixed contact 10 are disengaged, and a disconnection state is established.

  Next, when the engagement pin 22 is driven to the position B of the guide groove 41 due to the continuation of the above operation, the vacuum valve 2 is rotated to the grounding position while maintaining the blocking position, and the movable contact 9 is Fits to the ground side fixed contact 11. Furthermore, when the engaging pin 22 is driven to the position D of the guide groove 41 by continuing the operation, the vacuum valve 2 is turned on and the grounding operation is completed.

  In this embodiment, the engagement pin 22 needs to be driven from the position A of the guide groove 41 to the position C of the guide groove 42 in order to turn on the vacuum valve 2 that is shut off at the open / close position. (Not shown) applies a closing operation force in a downward direction on the paper surface. In addition, since the engagement pin 22 is driven from the position B of the guide groove 41 to the position D of the guide groove 41 in order to put the vacuum valve 2 from the shut-off position at the grounding position, in this embodiment, The operation device is configured in a 5-position type.

  In this embodiment, an example in which the guide 40 is made of an insulator has been described. However, the guide 40 is made of metal, and the cylinder where the engagement pin 22 is fitted with the guide groove 41 of the guide 40 is made of an insulator. It is also possible to configure.

  According to this embodiment, as in the above-described embodiment, the disconnection and grounding can be performed in response to the rotation of the vacuum valve that is turned on and off, and the vacuum valve is in the grounded state. Therefore, the drive unit and the operation mechanism can be simplified. As a result, a small and low-cost switchgear can be provided. In addition, since the guide 40 can regulate the disconnection position and the grounding position of the vacuum valve 2, the number of parts can be further reduced and the cost can be reduced.

11 and 12 show still another embodiment of the switchgear of the present invention. In this figure, the same reference numerals as those shown in FIGS. 4 and 10 are the same parts.
This embodiment is a further improvement of the embodiment shown in FIG. 10, and the engaging pin 22 is positioned at the position B of the guide groove 41 in the guide 40 from the grounding position, that is, the position D from the position B of the guide groove 41. The transition member 45 for surely transitioning is provided rotatably. The transition member 45 is provided with an opening 46 for receiving the engagement pin 22. The transition member 45 is connected to an operating device or a driving mechanism (not shown) through a lever 47 provided on the transition member 45.

Next, the operation of still another embodiment of the switchgear of the present invention described above will be described with reference to FIGS.
Similar to the embodiment shown in FIG. 10, the engagement pin 22 is driven from the position C of the guide groove 41 to position A, position E, position B, and position D by an operation mechanism (not shown). The operation of driving to the closing, disconnecting, disconnecting, and grounding positions is performed. When the engagement pin 22 is driven from the position A of the guide groove 41 to the position B of the guide groove 41, the opening 46 of the transition member 45 is moved from the arcuate portion of the guide groove 41, that is, from the position A to the position B. It is fixed so as to communicate with the corresponding groove portion.

  Next, after the engagement pin 22 is inserted into the opening 46 of the transition member 45, the transition member 45 is rotated counterclockwise by an operation mechanism (not shown) as shown in FIG. The opening 46 is fixed in the downward direction on the paper surface of FIG. Next, when the engagement pin 22 is driven downward in the drawing by an operating mechanism (not shown), the vacuum valve 2 is turned on and the grounding operation is completed.

  Note that the vacuum valve 2 is turned on and off on the ground closing side, and the dry operation from the grounding position to the disconnecting position is performed by reversing this procedure.

  In this embodiment, since the direction of the driving force for applying the vacuum valve 2 from the shut-off position at the disconnection closed position is the same as the direction of the driving force for applying the vacuum valve 2 from the shut-off position at the grounding position, As the operation device 3 for closing and operating the valve 2, a two-position type can be applied.

  According to this embodiment, as in the above-described embodiment, the disconnection and grounding can be performed in response to the rotation of the vacuum valve that is turned on and off, and the vacuum valve is in the grounded state. Therefore, the drive unit and the operation mechanism can be simplified. As a result, a small and low-cost switchgear can be provided. In addition, since the guide 40 can regulate the disconnection position and the grounding position of the vacuum valve 2, the number of parts can be further reduced and the cost can be reduced. In addition, operation reliability can be improved.

FIGS. 13 to 16 show another embodiment of the switchgear according to the present invention. FIG. 13 is a longitudinal side view of another switchgear according to the present invention. FIG. FIG. 15 is a cross-sectional view of another embodiment of the switchgear according to the present invention as viewed from the arrow XV-XV in FIG. 13. FIG. 16 is an enlarged view showing an operation mechanism portion constituting another embodiment of the switchgear according to the present invention. In these drawings, the same reference numerals as those shown in FIGS. 1 to 4 are the same or corresponding parts, and detailed description thereof will be omitted.
In this embodiment, as shown in FIG. 13 and FIG. 14, an operation device 3 for closing and operating the vacuum valve is provided above the vacuum valve 2, and an operation device 4 for disconnection operation is further provided thereabove. The operation device 3 for closing / closing operation and the operation device 4 for disconnection operation are connected to the vacuum valve 2 via an operation mechanism.

  Explaining the above operation mechanism, as shown in FIG. 15, an insulating operation rod 50 is connected to the movable contact of each vacuum valve 2 (left side in FIG. 15). These insulating operation rods 50 are connected to one end of an operation lever 51 for converting the rotational motion into the closing operation. These operation levers 51 are rotatably provided on another insulating support plate 52 provided between the insulating support plates 20. The other end of each operation lever 51 is connected by a three-phase connection link 53. As shown in FIGS. 15 and 13, one end of an operating lever 55 is connected to the intermediate portion of the three-phase connecting link 53 via a universal shaft joint 54 that transmits a twisting motion. The other end of the operation lever 55 is connected to one end of an operation rod 57 via a universal shaft joint 56 that transmits a twisting motion as shown in FIG.

The other end of the operating rod 57 is connected to the closing / blocking operation controller 3 and the operating rod 58, and the operating rod 58 is connected to the disconnecting operation controller 4. Details of this connection structure will be described with reference to FIG.
In FIG. 16, the operating rod 57 has a quadrangular cross section, and is penetrated through a square hole 60 provided at the base of the operating lever 59 so as to be movable in the axial direction. The base portion of the operation lever 59 is rotatably supported by the engagement between the circular protrusions 61 provided on both sides thereof and the holes 63 of the support bracket 62 fixed to the operation device chamber 111. The distal end of the operation lever 59 is connected to the closing / blocking operation controller 3 by the operation lever 64.

  Thereby, the operation rod 57 can be rotated in accordance with the operation of the closing / blocking operation controller 3 and can be moved in the axial direction by the operation of the disconnection operation controller 4. The rotational movement of the operation rod 57 turns on and off the vacuum valve 2 via the operation lever 55, the three-phase connecting link 53 and the operation lever 51 described above.

  The upper end of the operating rod 57 is connected to the lower end of the operating rod 58 by a universal rotary joint 65 that transmits axial driving force. The operation rod 58 is supported so as to be movable in the axial direction, and a rack gear 66 for transmitting axial driving force is provided on one surface thereof. As shown in FIG. 13, the rack gear 66 is engaged with a pinion gear 67 at the output end of the disconnecting operation controller 4.

  Thereby, the movement of the operation rod 58 in the axial direction turns the vacuum valve 2 to the ground side or the disconnection side via the operation rod 57 and the operation lever 55.

  Next, the operation of another embodiment of the switchgear according to the present invention will be described with reference to FIGS. FIG. 17 shows the input state of an embodiment of the switchgear according to the present invention, FIG. 18 shows the shut-off state of the switchgear according to one embodiment of the present invention, and FIG. FIG. 20 shows a ground disconnection state of an embodiment of the switchgear according to the present invention, and FIG. 21 shows a ground input state of an embodiment of the switchgear of the present invention.

  First, as shown in FIG. 18, when the movable contact 9 provided on the movable side of the vacuum valve 2 is fitted to the bus-side fixed contact 10 and the vacuum valve 2 is shut off, the vacuum valve 2 is turned on. When the shut-off operating device 3 is turned on, the operating lever 64 shown in FIG. 16 rotates the operating lever 59 clockwise in FIG. Along with this, the operation rod 55 is also driven to rotate in the clockwise direction toward the vacuum valve 2.

  The other end of the operation lever 55 is connected to an operation lever 51 arranged on the movable side of the vacuum valve 2 via a universal shaft joint 54 that transmits rotational movement. And the medium-phase vacuum valve 2 is turned on as shown in FIG. Further, the driving force accompanying the rotation of the operation lever 51 is transmitted to the other phase via the three-phase connecting link 53 shown in FIG. 15, and the vacuum valves 2 on both sides thereof are simultaneously turned on.

  At this time, the wiper mechanism (not shown) located between the operation lever 64 shown in FIG. 16 and the closing / closing operation device 3 of the vacuum valve 2 shown in FIG. A contact force is applied to the contact surface.

  Next, the switching operation from the on-state shown in FIG. 17 to the on-off state shown in FIG. 18 will be described. In the on-off state shown in FIG. 17, when the on / off operating device 3 of the vacuum valve 2 is shut off, FIG. The operating lever 64 rotates the operating lever 59 counterclockwise in FIG. Accordingly, the operation lever 51 is also driven to rotate counterclockwise toward the vacuum valve 2. Since the other end of the operation lever 51 is connected to the operation lever 51 disposed on the movable side of the vacuum valve 2 via a universal shaft joint 54 as shown in FIG. 15, the operation lever 51 is turned counterclockwise. Rotates and shuts off the intermediate phase vacuum valve 2 as shown in FIG. Further, the driving force of the operation lever 51 is transmitted to the other phase through the three-phase connecting link 53, and the vacuum valves 2 on both sides thereof are simultaneously shut off.

  Next, the switching operation from the shut-off state shown in FIG. 18 to the disconnection state shown in FIG. 19 will be described. In the shut-off state shown in FIG. 18, the disconnection operation controller 4 is driven to operate with the pinion gear 67 at the output end. When the operating rod 58 is driven upward along the axial direction by meshing with the rack gear 66 provided on the rod 58, the axial driving force of the operating rod 58 is transmitted to the operating rod 57. The operation rod 57 is fitted in a square hole 60 provided in the operation lever 59 shown in FIG. 16, but the movement in the axial direction is free, so that the driving force in the axial direction is transmitted to the operation lever 55. . Thereby, as shown in FIG. 19, the vacuum valve 2 is rotated to the disconnection position while maintaining the shut-off state, and the disconnection operation is completed.

  Next, the switching operation from the disconnection state shown in FIG. 19 to the grounding state shown in FIG. 20 will be described. In the disconnection state shown in FIG. 19, when the operation rod 58 is further driven in the upward direction by the disconnection operation controller 4. The vacuum valve 2 is further rotated while keeping the shut-off state, and the movable contact 9 is fitted to the ground-side fixed contact 11. As a result, the ground cut-off state shown in FIG.

  Next, the switching operation from the grounded state of FIG. 20 to the closed state of the vacuum valve 2 shown in FIG. 21 will be described. In the grounded state shown in FIG. Since the rod 57 and the operation lever 55 are twisted in the clockwise direction toward the vacuum valve 2, the closing operation is completed when the vacuum valve 2 is grounded.

  As described above, the operation of breaking, disconnecting, and grounding has been described starting from the input state. However, the operations of grounding, disconnecting, breaking, and closing can be performed by the reverse procedure.

  According to this embodiment, as in the above-described embodiment, the disconnection and grounding operations can be performed in response to the rotation of the vacuum valve that is turned on and off, and the vacuum valve Since it can also be thrown in, the drive part and the operation mechanism can be simplified. As a result, a small and low-cost switchgear can be provided.

  In addition, in this invention, it can apply not only to a cubicle type gas insulated switchgear but also to a switchgear in the air that does not use an insulating gas.

It is a vertical side view of one embodiment of the switchgear of the present invention. It is the rear view which looked at one Embodiment of the switchgear of this invention from the II-II arrow line of FIG. It is the cross-sectional view which looked at one Embodiment of the switchgear of this invention from the III-III arrow of FIG. It is a figure which expands and shows the vacuum valve part which comprises one Embodiment of the switchgear of this invention. It is explanatory drawing which showed the injection | throwing-in state of one Embodiment of the switchgear of this invention shown in FIG. It is explanatory drawing which showed the interruption | blocking state of one Embodiment of the switchgear of this invention shown in FIG. It is explanatory drawing which showed the disconnection state of one Embodiment of the switchgear of this invention shown in FIG. It is explanatory drawing which showed the earthing | grounding interruption | blocking state of one Embodiment of the switchgear of this invention shown in FIG. It is explanatory drawing which showed the earthing | grounding on state of one Embodiment of the switchgear of this invention shown in FIG. It is a side view which expands and shows a part of drive mechanism in other embodiment of the switchgear of this invention. It is a side view which expands and shows a part of drive mechanism in other embodiment of the switchgear of this invention. It is explanatory drawing which showed the operation | movement of the earthing | grounding interruption | blocking position in the further another embodiment of the switchgear of this invention shown in FIG. It is a vertical side view of other embodiment of the switchgear of this invention. It is the rear view which looked at other embodiment of the switchgear of this invention from the XIV-XIV arrow view of FIG. It is the cross-sectional view which looked at other embodiment of the switchgear of this invention from the XV-XV arrow of FIG. It is a figure which expands and shows the operation mechanism part which comprises other embodiment of the opening / closing apparatus of this invention shown in FIG. It is explanatory drawing which shows the injection | throwing-in state of other embodiment of the switchgear of this invention shown in FIG. It is explanatory drawing which shows the interruption | blocking state of other embodiment of the switchgear of this invention shown in FIG. It is explanatory drawing which shows the disconnection state of other embodiment of the switchgear of this invention shown in FIG. It is explanatory drawing which shows the earthing | grounding interruption | blocking state of other embodiment of the switchgear of this invention shown in FIG. It is explanatory drawing which shows the earthing | grounding on state of other embodiment of the switchgear of this invention shown in FIG.

Explanation of symbols

100 Outer box 110 Protection monitoring device room 111 Controller room 112 Switch room 113 Cable room 114 Bus room 1 Switch 2 Vacuum valve 3 Switch-off operation controller 4 Disconnection operation controller 5 Control lever 6 Control lever 7 Control lever 8 Control lever 9 Movable contact 10 Bus-side fixed contact 11 Ground-side fixed contact 12 Solid insulation bus 13 Ground bus 17 High-voltage cable

Claims (7)

A switchgear that can change the four states of closing, disconnecting, disconnecting and grounding,
The fixed side terminal and the movable side terminal that come in contact with and separate from each other, one end is pin-supported, and the other end is seated by the operation lever provided on the movable shaft of the movable side terminal and the pin support at the end on the fixed side terminal A vacuum valve that constitutes a bendable link mechanism and rotates about the pin on the fixed side terminal ;
A movable contact provided on the movable side of the vacuum valve;
A fixed contact for busbars provided on one rotational direction side of the movable contact;
A stationary contact for grounding provided on the other rotational direction side of the movable contact;
An operation device for the on / off operation and disconnection operation of the vacuum valve;
Switchgear being characterized in that an operating mechanism for connecting the movable terminal of the vacuum valve and the for making and breaking operation and a disconnection operation for the operation unit. A switchgear that can change the four states of closing, disconnecting, disconnecting and grounding,
A vacuum valve provided with a fixed side terminal and a movable side terminal, and supported rotatably about the fixed side terminal portion;
A movable contact provided on the movable side of the vacuum valve;
A spring that is arranged on the movable side of the vacuum valve and generates a force to open the vacuum valve;
A lever one end coupled to the movable shaft of the movable side terminal of said vacuum valve,
A support member for restraining the distance of the other end of the fixed-side terminal portion and the lever of the vacuum valve,
A fixed contact for busbars provided on one rotational direction side of the movable contact;
A stationary contact for grounding provided on the other rotational direction side of the movable contact;
An operation device for closing and operating the vacuum valve;
A disconnecting operation controller;
An opening / closing device comprising: an operating mechanism for connecting the operating device for closing / closing operation and the operating device for disconnection operation to the other end of the lever . The switchgear according to claim 2, wherein
The operating mechanism includes an operating lever for coupling the other end of the said making and breaking operation for manipulator lever, and characterized by being configured with an operating lever for connecting the disconnecting operation for the operation unit and the operating lever Opening and closing device. The switchgear according to claim 2, wherein
The operating mechanism is connected to the first operating rod that is moved linearly by the disconnecting operation controller, and is rotatably connected to the first operating rod. And an operation lever for connecting the second operation rod and the movable shaft of the vacuum valve so as to convert the torsional rotation of the second operation rod into a closing operation of the vacuum valve. The switchgear characterized by comprising. A switchgear that can change the four states of closing, disconnecting, disconnecting and grounding,
A vacuum valve provided with a fixed side terminal and a movable side terminal, and supported rotatably about the fixed side terminal portion;
A movable contact provided on the movable side of the vacuum valve;
A spring that is arranged on the movable side of the vacuum valve and generates a force to open the vacuum valve;
Engaging pin provided on the movable shaft of the movable side terminal of said vacuum valve,
A guide having a guide groove for guiding the engagement pin;
A fixed contact for busbars provided on one rotational direction side of the movable contact;
A stationary contact for grounding provided on the other rotational direction side of the movable contact;
An operating device for turning on and off the vacuum valve, and for turning operation;
An opening / closing device comprising: an operating mechanism for connecting the operating device and the engaging pin. The switchgear according to claim 5, wherein
The guide, the engagement pin, and a first groove for guiding the circular motion of the movable pin centered on the end of the fixed side terminal of the vacuum valve, the first groove An opening / closing apparatus comprising the guide groove that communicates with both ends and includes a second groove for moving the engagement pin radially inward of the first groove. The switchgear according to claim 5, wherein
The guide, the engagement pin, and a first groove for guiding the circular motion of the movable pin centered on the end of the fixed side terminal of the vacuum valve, the first groove both ends communicate respectively with the engaging said guide grooves of the engagement pin and a second groove for movement radially inwardly of said first groove, to one of the second grooves in said guide grooves An opening / closing device comprising a rotatable transition member having an opening that engages with the engagement pin.

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