JP2009080941A - Vacuum insulation switch and vacuum insulation switch gear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum insulation switch capable of realizing simplification of the whole of a plurality of position-type vacuum open-close switch including an operational mechanism and improvement of its reliability by further reducing in size and weight an operational mechanism part in the plurality of position-type vacuum open-close switch. <P>SOLUTION: This is the three-position type vacuum insulation switch operated open and close at a close position, an open position, and a grounding position, and equipped with a second operation mechanism 10 to carry out grounding operation of electromagnetic operation type installed at a side close to a movable electrode 4, and a first operation mechanism 9 to carry out block and input operation of electromagnetic operation type which is coupled with the second operation mechanism 10 and installed at a side far from the movable electrode 4. A movable iron core of the first and the second operation mechanisms 9, 10 are arranged at a common operation rod 11, the movable iron core of the second operation mechanism 10 allows movement of the operation rod 11 accompanied with the time of operation of the first operation mechanism 9, and is engaged with the operation rod 11 when operating the second operation mechanism 10. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vacuum insulation switch, and more particularly to a vacuum insulation switch having a cutoff and disconnection function.

  In the power receiving equipment, a vacuum circuit breaker for cutting off load current or accident current, a disconnecting switch and grounding switch for ensuring the safety of workers during load maintenance and inspection, and detection of system voltage and current A closed switchboard (referred to as switchgear) in which a device and a protective lure, etc. are housed in a housing is installed.

There are many different types of insulation for this switchgear. In addition to the conventional air insulation board and cubicle type gas insulation switchgear (GIS) using SF ₆ gas, nowadays, it is solid insulation from the viewpoint of environment. Compressed air insulation and all-vacuum insulation systems have appeared, and each insulation system has integrated functions such as circuit breakers, disconnectors, and grounding into a single switch unit. , Disconnection, grounding) that accommodates a vacuum switch (for example, see Patent Document 1).

JP 2000-164084 A

  The vacuum switch described above is a vacuum container that houses a three-position type opening / closing switch that takes a disconnection position in addition to turning on and off, or a four-position type opening / closing switch that takes a disconnection and grounding position in addition to turning on and off. Is small, lightweight, and highly reliable. For example, it can meet the needs for miniaturization and weight reduction for important facilities in distribution facilities in urban areas. .

  In recent power receiving / transforming facilities, the demands of users are diversified. For example, at the customer, the type of load and operating conditions differ depending on the purpose of use, so the power distribution system is planned in consideration of the required safety, reliability, operational maintenance, and future load increase. In this power distribution plan, consideration must also be given to the control of circuit breakers, disconnectors, grounding switches, etc. that comprise the power receiving and transformation equipment, and monitoring and measurement of voltage, current, power, etc.

  In this case, an important issue is how to reduce the installation space for the above-described devices and their control and monitoring / measurement devices so that investment for the installation can be suppressed. For this reason, when using the multi-position type vacuum opening / closing switch as described above, there is still room for further reducing the size and weight of the operating mechanism.

  The present invention has been made based on the above-described matters, and further simplifies the entire multi-position type vacuum opening / closing switch including the operation mechanism by further reducing the size and weight of the operation mechanism in the multi-position type vacuum opening / closing switch. An object of the present invention is to provide a vacuum insulating switch capable of achieving the improvement in reliability.

  To achieve the above object, the first invention is a three-position type vacuum insulating switch that is opened and closed to a closed position, an open position, and a grounding position, and is fixed in the vacuum container and the vacuum container. A fixed electrode, a movable contact housed in the vacuum vessel and contacting and leaving the fixed electrode, a vacuum insulating rod connected to the movable electrode, an insulating rod connected to the vacuum insulating rod via a bellows, An electromagnet operation type grounding operation connected to an insulating rod and provided on the side close to the movable electrode, and an electromagnet operation connected to the second operation mechanism and provided on the side far from the movable electrode A first operating mechanism that performs a shut-off operation of the shape, and the movable iron core of the first operating mechanism and the movable iron core of the second operating mechanism section are arranged on a common operating rod, and the second operating mechanism The movable iron core of the operating mechanism is Allow movement of the operating rod due to the time of the operating mechanism operating said during operation the second operation mechanism, wherein the engaging said operating rod by engagement means provided on the operating rod.

  Further, the second invention is a four-position type vacuum insulation switch that is opened and closed to a closed position, an open position, a disconnect position and a ground position, and a vacuum vessel, a fixed electrode fixed in the vacuum vessel, A movable electrode housed in the vacuum vessel and contacting and separating from the fixed electrode, a vacuum insulating rod connected to the movable electrode, an insulating rod connected to the vacuum insulating rod via a bellows, and connected to the insulating rod An electromagnet operation type grounding operation provided on the side close to the movable electrode, and an electromagnet operation type disconnection operation connected to the second operation mechanism and provided on the side far from the movable electrode. A first operation mechanism coupled to the third operation mechanism and an electromagnet operation type on / off operation provided on a side farther from the movable electrode. Mechanism and the second operation The movable iron cores of the mechanism and the third operating mechanism are arranged on a common operating rod that is connected to the insulating rod, and the movable iron core of the second operating mechanism portion is operated during the operation of the first operating mechanism. The operation rod is allowed to move, and when the second operation mechanism is operated, the operation rod is engaged by the first engagement means provided in the operation rod, and the movable iron core of the third operation mechanism is The operation rod is allowed to move when the first and second operation mechanisms are operated, and the operation rod is engaged with the operation rod by the second engagement means provided on the operation rod when the third operation mechanism is operated. It is characterized by combining.

  Furthermore, a third invention is characterized in that, in the first or second invention, the engaging means is provided with a stepped portion on the outer peripheral surface of the operating rod that contacts and engages with an end surface of the movable iron core. To do.

  According to a fourth invention, in any one of the first to third inventions, a contact pressure spring for separating the movable electrode from the fixed electrode is provided on the operation rod.

  Furthermore, a fifth aspect of the present invention is the electronic device according to any one of the first to fourth aspects, wherein the electromagnet-type operating mechanism includes a plunger disposed on the operating rod, a movable flat plate provided on the non-movable electrode side of the plunger, A movable iron core, a fixed iron core located on the movable electrode side, an annular side leg provided on one side on the outer peripheral side of the fixed iron core, a permanent magnet base provided on the other side of the side leg, and the fixed iron core A permanent iron provided on a permanent magnet stand of the fixed iron core so as to face a fixed iron core constituted by a central leg provided on the inner peripheral side of the body, a coil provided inside the fixed iron core, and a movable flat plate of the movable iron core. And a magnet.

  The sixth invention is characterized in that, in the first invention, the current driving force by the electromagnet of the second operating mechanism is made smaller than that of the first operating mechanism.

  Furthermore, a seventh invention is characterized in that, in the second invention, the current driving force by the electromagnets of the second and third operating mechanisms is made smaller than that of the first operating mechanism.

  According to the present invention, each movable part constituting each operation mechanism is arranged on the same operation rod, and the operation rod is operated in response to the operation of each movable part. The operation mechanism in the multi-position type vacuum on / off switch such as the disconnect position 3 position or the 4 position including the grounding position is further reduced in size and weight, and the entire multi-position type vacuum on / off switch including the operation mechanism is simplified. In addition, it is possible to provide a vacuum insulation switch that can achieve an improvement in its reliability and a vacuum insulation switchgear equipped with this vacuum insulation switch.

  Hereinafter, an embodiment of a vacuum insulation switch of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view showing an embodiment of a vacuum insulation switch of the present invention, and FIG. 2 is a diagram for explaining an open / close operation state of the embodiment of the vacuum insulation switch of the present invention shown in FIG. 2 (a), (b), and (c) show operation states at three positions of a closed position (introduction), an open position (cut), and a grounding position.

  In FIG. 1, the vacuum insulation switch 1 houses a fixed electrode 3 and a movable electrode 4 in a vacuum vessel 2. The fixed electrode 3 and the movable electrode 4 are connected to a power source or a load (not shown) via a fixed feeder and a movable feeder. The vacuum vessel 2 includes an insulating cylinder 2A, upper and lower end plates 2B and 2C arranged above and below, and a bellows 2D provided on the upper end plate 2A. Thereby, the movable electrode 4 operates so as to be able to contact and separate from the fixed electrode 3 in the vacuum container 2.

  One end of a movable conductor 5 is connected to the movable electrode 4 described above via a bellows 2D. The other end of the movable conductor 5 is connected to an insulating rod 7 by a pin 6. A contact pressure spring 8 for applying a contact load to the movable electrode 4 to the fixed electrode 3 is connected to the insulating rod 7.

  A closed position Y1 for energizing the movable electrode 4 with respect to the fixed electrode 3 as shown in FIG. 2A and an open position Y2 for interrupting the current shown in FIG. A first operating mechanism 9 serving as a shut-off operating mechanism section, and a grounding position for ensuring the safety of an inspection worker against a surge voltage such as lightning on the movable electrode 4 shown in FIG. An operation mechanism including the second operation mechanism 10 serving as a disconnection operation mechanism unit operated at Y3 is coupled.

  The first operation mechanism 9 and the second operation mechanism 10 described above are electromagnet operation types including a movable iron core, a fixed iron core, a permanent magnet, and a coil that linearly moves the movable electrode 4 to a closed position, an open position, and a grounding position. The second operation mechanism 10 is configured to be arranged in series on the side closer to the movable electrode 4 and the first operation mechanism 9 is arranged on the side farther from the movable electrode 4 in series. The operating rod 11 in the first operating mechanism 9 and the second operating mechanism 10 is a common operating rod and is integrally connected to the insulating rod 7.

Next, detailed configurations of the first operating mechanism 9 and the second operating mechanism 10 described above will be described.
First, the second operation mechanism 10 will be described. The second operation mechanism 10 includes a movable iron core 100, a fixed iron core 110, a coil 120, and a permanent magnet 130. The movable iron core 100 includes a plunger 101 and a movable flat plate 102, and has a substantially T-shaped cross section. The operation rod 11 penetrates through the plunger 101 and the movable flat plate 102 so as to be movable. On the outer peripheral surface of the operation rod 11 corresponding to the second operation mechanism 10, there is a step portion 11 </ b> A obtained by making the outer diameter on the first operation mechanism 9 side smaller than the outer diameter on the movable electrode 4 side. Is formed. The step portion 11A engages with the inner end surface of the plunger 101 on the movable electrode 4 side as the operation rod 11 moves during the grounding operation.

  The fixed iron core 110 includes a fixed iron core 111 positioned on the movable electrode 4 side, an annular side leg 112 provided on one side on the outer peripheral side of the fixed iron core 111, and a permanent magnet base provided on the other side of the side leg 112. 113 and a central leg 114 provided on the inner peripheral side of the fixed iron core 111 is fixedly arranged. A coil 120 is disposed inside the fixed iron core. A plunger 101 of the movable iron core 100 passes through the center of the coil 120. An annular permanent magnet 130 is attached to the permanent magnet base 113 so as to face the movable flat plate 102 of the movable iron core 100. The above-described fixed iron core 111, side legs 112, and permanent magnet base 113 are assembled by being sandwiched by bolts and nuts to constitute an electromagnet.

  Next, the first operation mechanism 9 will be described. The first operation mechanism 9 includes a movable iron core 90, a fixed iron core 93, a coil 94, and a permanent magnet 95, similar to the second operation mechanism 10 described above. It is configured. The movable iron core 90 includes a plunger 91 and a movable flat plate 92, and has a substantially T-shaped cross section. The operation rod 11 passes through the plunger 91 and the movable flat plate 92. A plunger 91 and a movable flat plate 92 are fixed to the operating rod 11 by a step portion 11B and a nut 11C formed on the outer periphery by reducing the diameter thereof.

  The fixed iron core 93 includes a fixed iron core body 930 positioned on the movable electrode 4 side, an annular side leg 931 provided on one side of the outer periphery of the fixed iron core body 930, and a permanent magnet base provided on the other side of the side leg 931. 932 and a central leg 933 provided on the inner peripheral side of the fixed iron core body 930 and fixedly arranged. A coil 94 is disposed inside the fixed iron core. A plunger 91 of the movable iron core 90 passes through the center of the coil 94. An annular permanent magnet 95 is attached to the permanent magnet base 932 so as to face the movable flat plate 92 of the movable iron core 90. The above-described fixed iron core 930, side legs 931, and permanent magnet base 932 are assembled by being clamped with bolts and nuts to constitute an electromagnet.

Next, the operation of the above-described embodiment of the vacuum insulation switch of the present invention will be described with reference to FIGS.
FIG. 1 and FIG. 2 (a) show a case where an embodiment of the vacuum insulation switch of the present invention is in a closed position (turned on). 1 and 2A, since the coil 94 of the first operating mechanism 9 and the coil 120 of the second operating mechanism 10 are energized, the first operating mechanism 9 A suction force acts on the plunger 91 and the plunger 101 of the second operation mechanism 10, and the plunger 91 of the first operation mechanism 9 and the plunger 101 of the second operation mechanism 10 have a central leg 933 and a central leg 114, respectively. It is in a state of moving toward.

  As a result, the operating rod 11 moves the movable electrode 4 toward the fixed electrode 3 to contact the fixed electrode 3. Thereby, it will be in the closed position Y1 (input). In this closed position Y1 (introduction), the contact pressure spring 8 is stored by the movement of the operation rod 11, and is prepared for the opening operation. Further, in order to obtain a holding force opposite to the accumulating force of the contact pressure spring 8, it is magnetically latched by the attractive force of the permanent magnet 95 of the first operating mechanism 9.

  Note that the plunger 101 and the movable flat plate 102 of the second operation mechanism 10 move along the operation rod 11 by the attractive force of the permanent magnet 113 and are attracted to the permanent magnet 130 and magnetically latched.

Next, the case where the opening operation is performed from the above-described closed position Y1 (insertion) to the open position Y2 (cutting) will be described with reference to FIG.
In the opening operation, the stored power of the contact pressure spring 8 is used. In other words, the coil 94 in the first operating mechanism 9 is excited in the opposite direction to that in the closing operation, the magnetic flux of the permanent magnet 95 is canceled, and the attraction acting between the plunger 91 and the central leg 933 in the first operating mechanism 9. Reduce power. Thereby, the operating rod 11 separates the movable electrode 4 from the fixed electrode 3 by the stored force of the contact pressure spring 8, and opens the gap G1 as shown in FIG.

At this time, the plunger 101 and the movable flat plate 102 in the second operation mechanism 10 are not moved by the magnetic latch by the permanent magnet 130 and allow the operation rod 11 to move.
Further, the step portion 11A of the operation rod 11 is in contact with the end face of the plunger 101 in the second operation mechanism 10 and is in a state capable of responding to the grounding operation.

Next, an operation (grounding operation) from the open position Y2 to the grounding position Y3 by the second operation mechanism 10 will be described with reference to FIG.
In the grounding operation, the accumulating force of the contact pressure spring 8 is used as in the above-described opening operation. That is, the coil 120 in the second operating mechanism 10 is excited in the opposite direction to that of the closing operation, cancels the magnetic flux of the permanent magnet 130, and attracts between the plunger 101 and the central leg 114 in the second operating mechanism 10. Reduce power. As a result, the operating rod 11 moves the movable electrode 4 away from the fixed electrode 3 by the stored force of the contact pressure spring 8.

  At this time, since the step portion 11A of the operation rod 11 is engaged with the inner end surface of the plunger 101 on the movable electrode 4 side in the second operation mechanism 10, the operation rod 11 integrates the plunger 101 and the movable flat plate 102 together. As shown in FIG. 2C, the movable electrode 4 is further moved away from the fixed electrode 3 to be grounded with a gap G2 shown in FIG.

  At this time, the movable flat plate 102 in the second operation mechanism 10 comes into contact with the end surface of the fixed iron core body 930 constituting the fixed iron core 93 of the first operation mechanism 9 and stops. By setting the distance that the movable flat plate 102 of the second operation mechanism 10 contacts the end surface of the fixed iron core 930 of the first operation mechanism 9, the insulation distance in the disconnected state can be determined. That is, the position of the end surface of the fixed iron core 930 of the first operating mechanism 9 with respect to the position of the permanent magnet 95 in the second operating mechanism 10 maintains the insulation distance necessary when in the grounding state. The operation mechanism 9 may be fixedly arranged with the second operation mechanism 10.

  According to the above-described embodiment of the present invention, each operation mechanism is operated by the same operation rod 11, and the movable part movable together with the operation rod 11 is a movable iron core of the operation mechanism, and the movable part Therefore, the operating speed at the time of turning on, turning off and disconnecting by each operating mechanism becomes constant, and the operating characteristics thereof can be made the same. As a result, it is possible to construct a highly reliable operation mechanism, and it is possible to improve the reliability of a vacuum insulation switch that is opened and closed at three positions: turning on, turning off, and grounding.

  Further, since the operation mechanism 9 for turning on and off the movable electrode 4 and the operation mechanism 10 for grounding are arranged in a direction in which the operation direction is linearly operated, there is no waste of space, and a small mechanism can be provided. it can.

  In addition, the operating distances of the operating mechanisms 9 and 10 can be made different. For example, the operating mechanism closer to the movable electrode 4 is the first stage, the far side is the second stage, and the first operating mechanism. When the operation distance of 10 is configured to be smaller than the operation distance of the second-stage operation mechanism 9, the second-stage operation mechanism is not yet operated after the first-stage operation mechanism is operated and the shut-off operation is performed. Since there is a distance, the disconnecting position can be taken by operating the second stage operation mechanism. This operating distance ((open / close distance between closing / shut-off / grounding)) can be set arbitrarily for the open / close distance of each operation mechanism. It becomes possible to respond.

  In addition, since the contact pressure spring 8 is provided on the operation rod 11, it is not necessary to provide a return spring for each of the operation mechanisms 9 and 10, and the electromagnet-type operation mechanism can be simplified and the number of parts can be reduced. Weight reduction can be achieved.

  In the above-described embodiment, the current driving force in the electromagnet configuration of the first operating mechanism 9 and the second operating mechanism 10 is the same, but the grounding operation by the second operating mechanism 10 is the first operation mechanism. Therefore, the current driving force in the electromagnet configuration of the second operating mechanism 10 can be made smaller than that of the first operating mechanism 9. In this case, since the axial dimension of the second operating mechanism 10 can be reduced, the overall axial dimension of the operating mechanism can be further reduced.

FIG. 3 is a longitudinal sectional view showing another embodiment of the vacuum insulation switch of the present invention, and FIG. 4 is a diagram for explaining an open / close operation state of another embodiment of the vacuum insulation switch of the present invention shown in FIG. (A), (b), (c), and (d) of FIG. 4 show operation states at four positions of a closed position (injection), an open position (disconnection), a disconnection position, and a grounding position. Yes. In FIG. 4, the vacuum switch 2 is omitted for drawing.
3 and 4, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is omitted. In this embodiment, a third mechanism 20 is further provided in the embodiment shown in FIG. That is, the third operation mechanism 20 is disposed between the first operation mechanism 9 and the second operation mechanism 10.

  The third operating mechanism 20 is configured in the same manner as the first operating mechanism 9 and the second operating mechanism 10 shown in FIG. 1, and includes a movable iron core 210, a fixed iron core 220, a coil 230, and a permanent magnet 240. It is prepared for. The movable iron core 210 includes a plunger 211 and a movable flat plate 212, and has a T-shaped cross section. The operating rod 11 passes through the plunger 211 and the movable flat plate 212 so as to be movable. On the outer peripheral surface of the operation rod 11 corresponding to the third operation mechanism 20, there is a step portion 11 </ b> C obtained by making the outer diameter on the second operation mechanism 10 side smaller than the outer diameter on the movable electrode 4 side. Is formed. The step portion 11C comes into contact with and engages with the inner end surface of the plunger 211 on the movable electrode 4 side as the operation rod 11 moves during the grounding operation.

  The fixed iron core 220 includes a fixed iron core body 221 positioned on the movable electrode 4 side, an annular side leg 222 provided on one side on the outer peripheral side of the fixed iron core body 221, and a permanent magnet base provided on the other side of the side leg 222. 223 and a central leg 224 provided on the inner peripheral side of the fixed iron core 221 are fixedly arranged. A coil 230 is disposed inside the fixed iron core. The plunger 211 of the movable iron core 210 passes through the center of the coil 230. An annular permanent magnet 240 is attached to the permanent magnet base 223 so as to face the movable flat plate 212 of the movable iron core 210. The above-described fixed iron core body 221, side legs 222, and permanent magnet base 223 are assembled by being sandwiched by bolts and nuts to constitute an electromagnet.

Next, the operation of another embodiment of the vacuum insulation switch of the present invention described above will be described with reference to FIGS.
FIG. 3 and FIG. 4A show a case where an embodiment of the vacuum insulation switch of the present invention is in the closed position (closed) state. 3 and FIG. 4A, the coil 94 of the first operating mechanism 9, the coil 120 of the second operating mechanism 10, and the coil 230 of the third operating mechanism 20 are energized. Therefore, a suction force acts on the plunger 91 of the first operation mechanism 9, the plunger 101 of the second operation mechanism 10, and the plunger 211 of the third operation mechanism 20, and the plunger 91 of the first operation mechanism 9 The plunger 101 of the second operation mechanism 10 and the plunger 211 of the third operation mechanism 20 are moved toward the center leg 933, the center leg 114, and the center leg 224, respectively.

  As a result, the operating rod 11 moves the movable electrode 4 toward the fixed electrode 3 to contact the fixed electrode 3. Thereby, it will be in the closed position Y1 (input). In this closed position Y1 (introduction), the contact pressure spring 8 is stored by the movement of the operation rod 11, and is prepared for the opening operation. Further, in order to obtain a holding force that opposes the stored force of the contact pressure spring 8, a magnetic latch is configured by the attractive force of the permanent magnet 95 of the first operating mechanism 9.

  The plunger 101 and the movable plate 102 of the second operation mechanism 10 and the plunger 211 and the movable plate 212 of the third operation mechanism 20 move along the operation rod 11 by the attractive force of the permanent magnets 130 and 240. The magnetic latch is performed by being attracted to the permanent magnets 130 and 240.

Next, the case where the opening operation is performed from the above-described closed position Y1 (insertion) to the open position Y2 (cutting) will be described with reference to FIG.
In the opening operation, the stored power of the contact pressure spring 8 is used. In other words, the coil 94 in the first operating mechanism 9 is excited in the direction opposite to that in the closing operation, the magnetic flux of the permanent magnet 95 is canceled, and the attraction acting between the plunger 91 and the central leg 933 in the first operating mechanism 9. Reduce power. As a result, the operating rod 11 separates the movable electrode 4 from the fixed electrode 3 by the stored force of the contact pressure spring 8 and puts it into the open state shown in FIG.

  At this time, the plunger 101 and the movable plate 102 in the second operation mechanism 10 and the plunger 211 and the movable plate 212 of the third operation mechanism 20 are not moved by the magnetic latches by the permanent magnets 130 and 240, and the operation rod 11 movements are allowed.

  Further, the step portion 11C of the operating rod 11 is in contact with and engaged with the end surface of the plunger 211 in the second operating mechanism 20, and is in a state capable of responding to a disconnection operation.

Next, an operation (disconnection operation) from the open position Y2 to the disconnection position Y4 by the third operation mechanism 10 will be described with reference to FIG.
In the disconnecting operation, the accumulating force of the contact pressure spring 8 is used as in the above-described opening operation. That is, the coil 230 in the third operating mechanism 20 is excited in the opposite direction to that of the closing operation, cancels the magnetic flux of the permanent magnet 240, and attracts between the plunger 211 and the central leg 224 in the third operating mechanism 20. Reduce power. As a result, the operating rod 11 moves the movable electrode 4 away from the fixed electrode 3 by the stored force of the contact pressure spring 8.

  At this time, since the step portion 11C of the operation rod 11 is in contact with the inner end surface of the plunger 211 on the movable electrode 4 side in the third operation mechanism 20, the operation rod 11 is formed by integrating the plunger 211 and the movable plate 212. Then, it moves in the direction of the first operating mechanism 9 to further move the movable electrode 4 away from the fixed electrode 3 so that the disconnected state shown in FIG.

  At this time, the movable flat plate 210 in the third operation mechanism 20 comes into contact with the end surface of the fixed iron core body 930 constituting the fixed iron core 93 of the first operation mechanism 9 and stops.

  At this time, the step portion 11A of the operation rod 11 is in contact with the inner end face of the plunger 101 in the second operation mechanism 10 and is in a state capable of responding to the grounding operation.

Next, an operation (grounding operation) from the disconnection position Y4 to the grounding position Y3 by the second operation mechanism 10 will be described with reference to FIG.
In the grounding operation, the accumulating force of the contact pressure spring 8 is used as in the above-described opening and disconnection operations. That is, the coil 120 in the second operating mechanism 10 is excited in the opposite direction to that of the closing operation, cancels the magnetic flux of the permanent magnet 130, and attracts between the plunger 101 and the central leg 114 in the second operating mechanism 10. Reduce power. As a result, the operating rod 11 moves the movable electrode 4 in a direction further away from the fixed electrode 3 by the stored force of the contact pressure spring 8.

  At this time, since the stepped portion 11A of the operation rod 11 is in contact with the inner end surface of the plunger 211 in the second operation mechanism 10, the operation rod 11 is configured so that the plunger 101 and the movable flat plate 102 are integrated into a third operation. By moving in the direction of the mechanism 20, the movable electrode 4 is further separated from the fixed electrode 3, and the disconnected state shown in FIG.

  At this time, the movable flat plate 102 in the second operation mechanism 10 comes into contact with the end surface of the fixed iron core 221 of the third operation mechanism 20 and stops.

  According to the above-described other embodiment of the present invention, in the above-described embodiment, by adding one operation mechanism, the closed position (injection), the open position (disconnection), the disconnection position, and the grounding position are added. A four-position type vacuum switchgear that can be operated to a position can be easily realized, and it is possible to provide a vacuum insulation switch device that is excellent in versatility. In addition, similar to the above-described embodiment, the operating mechanism is further reduced in size and weight, and opening and closing that can achieve simplification of the entire multi-position type vacuum opening / closing switch including the operating mechanism and improvement of its reliability. A highly reliable vacuum insulated switchgear that can be realized can be provided.

  In the above-described embodiment, the operation rod 11 is in contact with and engaged with the end surface of the plunger 101 in the second operation mechanism 10 and the end surface of the plunger 211 in the third operation mechanism 20. Although the step portion 11 </ b> C that contacts and engages is formed, it is also possible to provide a protruding portion on the outer peripheral surface of the operating rod 11.

  In the above-described embodiment, the current driving force in the electromagnet configuration of the first operating mechanism 9 and the second operating mechanism 10 is the same, but the grounding operation by the second operating mechanism 10 is the first operation mechanism. Therefore, the current driving force in the electromagnet configuration of the second operating mechanism 10 can be made smaller than that of the first operating mechanism 9. In this case, since the axial dimension of the second operating mechanism 10 can be reduced, the overall axial dimension of the operating mechanism can be further reduced.

It is a longitudinal cross-sectional view which shows one Embodiment of the vacuum insulation switch of this invention. It is a figure explaining the opening / closing operation state of one Embodiment of the vacuum insulation switch of this invention shown in FIG. It is a longitudinal cross-sectional view which shows other embodiment of the vacuum insulation switch of this invention. It is a figure explaining the opening-and-closing operation state of other embodiment of the vacuum insulation switch of this invention shown in FIG.

Explanation of symbols

1 Vacuum Insulation Switch 2 Vacuum Container 3 Fixed Electrode 4 Movable Electrode 5 Movable Conductor 6 Pin 7 Insulating Rod 8 Contact Pressure Spring 9 First Operation Mechanism 10 Second Operation Mechanism 20 Third Operation Mechanism

Claims (7)

A three-position type vacuum insulation switch that is opened and closed to a closed position, an open position, and a ground position,
A vacuum vessel, a fixed electrode fixed in the vacuum vessel, a movable contact housed in the vacuum vessel and contacting and separating from the fixed electrode, a vacuum insulating rod connected to the movable electrode, and the bellows via the bellows An insulating rod connected to a vacuum insulating rod, a second operating mechanism connected to the insulating rod and connected to the movable electrode, and connected to the movable electrode, and connected to the second operating mechanism. An electromagnet operation type shut-off operation provided on a side far from the movable electrode;
The movable iron core of the first operation mechanism and the movable iron core of the second operation mechanism portion are arranged on a common operation rod,
The movable iron core of the second operation mechanism allows the operation rod to move along with the operation of the first operation mechanism, and when the second operation mechanism is operated, the engagement means provided on the operation rod causes the movement of the operation rod. A vacuum insulation switch characterized by engaging with an operating rod. A four-position type vacuum insulation switch that is opened / closed to a closed position, an open position, a disconnect position, and a ground position,
A vacuum vessel, a fixed electrode fixed in the vacuum vessel, a movable electrode housed in the vacuum vessel and contacting and separating from the fixed electrode, a vacuum insulating rod connected to the movable electrode, and a bellows through the bellows An insulating rod connected to a vacuum insulating rod, a second operating mechanism connected to the insulating rod and connected to the movable electrode, and connected to the movable electrode, and connected to the second operating mechanism. A third operating mechanism for operating an electromagnet disconnection provided on the side far from the movable electrode, and an insertion / blocking operation for an electromagnet operating type connected to the third operating mechanism and provided further on the side farther from the movable electrode A first operating mechanism that
The movable iron cores of the first operation mechanism, the second operation mechanism, and the third operation mechanism are arranged on a common operation rod that is connected to the insulating rod,
The movable iron core of the second operation mechanism section allows the operation rod to move along with the operation of the first operation mechanism, and the first engagement provided on the operation rod during the operation of the second operation mechanism. Engaging with the operating rod by a joint means;
The movable iron core of the third operation mechanism allows the operation rod to move along with the operation of the first and second operation mechanisms, and the second operation rod provided on the operation rod during the operation of the third operation mechanism. The vacuum insulating switch is characterized in that it is engaged with the operation rod by the engaging means. The vacuum insulation switch according to claim 1 or 2,
The vacuum insulating switch according to claim 1, wherein the engaging means is provided with a stepped portion on the outer peripheral surface of the operating rod that contacts and engages with an end surface of the movable core. The vacuum insulation switch according to any one of claims 1 to 3,
A vacuum insulation switch, wherein the operating rod is provided with a contact pressure spring for separating the movable electrode from the fixed electrode. The vacuum insulation switch according to any one of claims 1 to 4,
Each of the electromagnet-type operation mechanisms includes a movable iron core composed of a plunger disposed on the operation rod and a movable flat plate provided on the non-movable electrode side of the plunger,
A fixed iron core body located on the movable electrode side, an annular side leg provided on one side on the outer peripheral side of the fixed iron core body, a permanent magnet base provided on the other side of the side leg, and an inner peripheral side of the fixed iron core body A fixed iron core composed of a central leg,
A coil provided inside the fixed iron core;
A vacuum insulation switch, comprising: a permanent magnet provided on a permanent magnet base of the fixed core so as to face the movable flat plate of the movable core. The vacuum insulated switch according to claim 1,
A vacuum insulating switch characterized in that a current driving force by an electromagnet of the second operating mechanism is made smaller than that of the first operating mechanism. The vacuum insulated switch according to claim 2,
A vacuum insulating switch characterized in that a current driving force by an electromagnet of the second and third operating mechanisms is smaller than that of the first operating mechanism.

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