WO2023188287A1 - Opening and closing device - Google Patents

Opening and closing device Download PDF

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Publication number
WO2023188287A1
WO2023188287A1 PCT/JP2022/016571 JP2022016571W WO2023188287A1 WO 2023188287 A1 WO2023188287 A1 WO 2023188287A1 JP 2022016571 W JP2022016571 W JP 2022016571W WO 2023188287 A1 WO2023188287 A1 WO 2023188287A1
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WO
WIPO (PCT)
Prior art keywords
electrode
terminal
opening
switchgear
spring
Prior art date
Application number
PCT/JP2022/016571
Other languages
French (fr)
Japanese (ja)
Inventor
淳一 安部
耕一 香川
貴広 江戸
泰規 中村
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2022546615A priority Critical patent/JP7162782B1/en
Priority to PCT/JP2022/016571 priority patent/WO2023188287A1/en
Publication of WO2023188287A1 publication Critical patent/WO2023188287A1/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/04Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/08Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02Details
    • H01H33/04Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet

Definitions

  • This application relates to a switching device that switches on and off current.
  • a gas-insulated switchgear switching equipment such as a circuit breaker, a disconnector, and a grounding switch are housed in a container filled with an insulating gas (SF6 gas, dry air, etc.).
  • SF6 gas insulating gas
  • Each device has a structure in which electrodes face each other, and is required to have the ability to interrupt the arc that occurs when the electrodes are separated.
  • the insulating gas inside the gas-insulated switchgear is SF6 gas, which has high breaking performance, it can be shut off using a standard method that does not provide a quick-acting function, but the breaking performance is about 1/100 of that of SF6 gas. Dry air is known to be difficult.
  • the straight line method is a method in which the current is interrupted by extending the arc generated when the electrodes are separated using a drive device.
  • the quick cut method and magnetic drive method are known as technologies for improving current interrupting performance.
  • the quick-cutting method is a technology that uses a quick-acting mechanism on one side of the electrode to increase the opening speed, thereby extending the arc to the length necessary to extinguish the arc within the time that does not cause damage to the contacts, and achieving breaking performance. It is.
  • the male engagement device and the female engagement device are mechanically connected and disconnected using a spring so that the quick-acting mechanism can be installed regardless of the margin of installation space. In this way, we realized a structure in which the quick-acting mechanism is installed on the fixed electrode side.
  • the magnetic drive method is a method in which a magnet is installed in the switchgear as described in Patent Document 1, and the arc generated when the current is interrupted is magnetically driven and interrupted.
  • Patent Document 1 adopts a mechanical engagement mechanism using an engagement device, the structure is complicated, processing costs and assembly steps are increased, and the engagement is caused by sliding wear due to multiple operations. There was a problem that defects occurred. Further, in Patent Document 1, the male side engager and the female side engager are mechanically connected at a position near the tip of the fixed side terminal, and the fixed side electrode follows the movable side electrode. It starts moving in the direction of the movable side terminal which is arranged opposite to. While the electrode is moving, the restoring force of the spring and the frictional force of the engagement device are balanced and the connection is released.
  • a magnet is inserted inside a fixed terminal arranged outside the fixed electrode, and the electrode opening position (initial arc ignition position) is a position away from the fixed terminal and the magnet.
  • the strength of the magnetic field generated by the magnet decreases as the distance from the magnet increases, so from immediately after the electrodes open until the fixed electrode reaches a certain distance, the field strength is sufficient to magnetically drive the arc. The problem was that it was impossible to do so.
  • the object of the present invention is to obtain a switchgear having a simple structure, having sufficient magnetic field strength to extinguish the arc generated by a magnet, and having high interrupting performance.
  • the switching device is a switching device that opens and closes between a first terminal and a second terminal that are arranged opposite to each other.
  • a second electrode provided on a terminal and driven so as to be able to come into contact with and separate from the first electrode; the first electrode and the second electrode are magnets disposed inside each electrode; They are constructed so that they come into contact and maintain continuity due to the attractive force of the two.
  • the first electrode and the second electrode are configured to be electrically connected by the attractive force of the magnets inside them, and since a magnetic field is formed around each electrode, the point At the same time as the arc (the moment when the gap between the poles opens), it is possible to stably supply the magnetic field necessary for extinguishing the arc, thereby improving the interrupting performance. Furthermore, since there is no complicated engagement mechanism, the structure can be simplified and processing costs and assembly steps can be reduced.
  • FIG. 3 is a sectional view showing an open state of the switchgear according to the first embodiment.
  • FIG. 2 is a cross-sectional view showing a closed circuit state of the switchgear according to the first embodiment.
  • FIG. 2 is a cross-sectional view showing the switchgear according to the first embodiment during a circuit opening operation.
  • FIG. 3 is a cross-sectional view showing an arc generation state when the switchgear according to the first embodiment is opened.
  • FIG. 7 is a sectional view showing an open state of the switchgear according to the second embodiment.
  • FIG. 7 is a sectional view showing the switchgear according to the second embodiment during a circuit-opening operation.
  • FIG. 7 is a cross-sectional view showing an open state of the switchgear according to Embodiment 3; FIG.
  • FIG. 7 is a cross-sectional view showing the switchgear according to Embodiment 3 during a circuit-opening operation.
  • FIG. 7 is a sectional view showing an open state of the switchgear according to the fourth embodiment.
  • FIG. 7 is a cross-sectional view showing the switchgear according to the fourth embodiment during a circuit opening operation.
  • FIG. 7 is a sectional view showing an open state of the switchgear according to the fifth embodiment.
  • FIG. 9 is a cross-sectional view showing an arc generation state when the switchgear according to the fifth embodiment is opened;
  • FIG. 7 is a sectional view showing an open state of the switchgear according to the sixth embodiment.
  • FIG. 7 is a sectional view showing the switchgear according to the sixth embodiment during a circuit-opening operation.
  • FIG. 1 is a sectional view showing an open state of the switchgear according to the first embodiment.
  • the basic performance for opening the electric path is composed of a first electrode 2a and a second electrode 3b facing each other.
  • the first electrode 2a and the second electrode 3b are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b.
  • the second electrode 3b is connected to a drive device (not shown), and can be driven in the left-right direction in the drawing.
  • the first electrode 2a and the second electrode 3b are cylindrical columns provided coaxially, and the outer peripheral portions are angled so as to be drawn downward.
  • a first terminal 1a and a second terminal 1b are installed outside the first electrode 2a and the second electrode 3b, respectively, and are electrically connected through contacts 6a and 6b. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2a and the second electrode 3b come into contact, a current-carrying path is formed and power is transmitted. . It also has the effect of relaxing the electric field and protecting the electrodes from damage caused by arcing.
  • magnets 5a and 5b are installed in the cavities at the center of the first electrode 2a and the second electrode 3b, respectively, and are held by attaching covers 4a and 4b to the surfaces facing each magnet.
  • the magnetic pole directions of the magnets 5a and 5b are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2a and the second electrode 3b are brought into contact with each other.
  • the material of the covers 4a and 4b is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE (polytetrafluoroethylene).
  • a fixed stopper 7a is attached to the first terminal 1a
  • a movable stopper 8a and a spring 9 are attached to the first electrode 2a.
  • a spring 9 is installed between the fixed stopper 7a and the movable stopper 8a, and as the first electrode 2a moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, and the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7a does not move and its position does not change. In this way, the first electrode 2a is fixed to the first terminal 1a by the spring 9.
  • FIG. 1 shows an open state of the switchgear according to the first embodiment.
  • a drive device (not shown) is connected to the second electrode 3b, and opens and closes the electrode by driving the second electrode 3b in the left-right direction on the paper in FIG.
  • FIG. 2 shows a closed circuit state of the switchgear according to the first embodiment, and is a sectional view when the second electrode 3b is inserted.
  • the second electrode 3b contacts the first electrode 2a, an electric path is formed.
  • the power flowing into the first terminal 1a connected to another device passes through the contact 6a, is transmitted to the first electrode 2a, passes through the contacted second electrode 3b, and is transferred to the contact 6b.
  • the first electrode 2a and the second electrode 3b are engaged and connected by the magnetic attraction of magnets 5a and 5b installed in the central cavity, and the second electrode 3b is connected by a driving device (not shown). Even when moving to the right in the paper, contact between the electrodes is maintained and conduction is maintained.
  • FIG. 3 shows the opening/closing device according to the first embodiment during the opening operation, and is a cross-sectional view of the second electrode 3b moving to the opening position after engagement and connection due to magnetic attraction.
  • the fixed stopper 7a does not move because it is attached to the first terminal 1a and its position does not change.
  • the second electrode 3b is driven to the right in the drawing, the greater the restoring force of the spring 9 becomes.
  • the restoring force of the spring 9 and the attractive force of the magnets 5a, 5b are balanced, the magnetic engagement is released, and the restoring force of the spring 9 separates the first electrode 2a and the second electrode 3b.
  • the opening of the switchgear is achieved by connecting the first electrode 2a and the attractive force of the magnets 5a, 5b between the second electrode 3b and the first electrode 2a, which are driven in the opening direction while maintaining continuity. This utilizes the restoring force of the spring 9 that stops.
  • FIG. 4 is a cross-sectional view showing a state in which the arc generated between the electrodes is interrupted after the magnetic engagement is released when the switchgear according to the first embodiment is opened.
  • the magnetic engagement is released, and the first electrode 2a and the second electrode 3b are separated due to the restoring force of the spring 9, during energization. If so, an arc 10 is generated between the first electrode 2a and the second electrode 3b.
  • the generated arc 10 rotates in the circumferential direction of the electrode due to the magnetic field created by the magnets 5a and 5b.
  • the firing point on the electrode surface (the end of the arc 10) gradually moves toward the outer periphery of the electrode as the rotation continues.
  • the second electrode 3b returns to the open position by a drive device (not shown), and the first electrode 2a returns to the open position after repeating minute vibrations in the horizontal direction in the drawing due to the restoring force of the spring 9.
  • the present application has a structure in which the first electrode 2a and the second electrode 3b are magnetically engaged and connected by the attractive force of magnets 5a and 5b installed in a cavity at the center. Therefore, the structure is simple and does not require a complex structure of the engagement device, which reduces processing costs and assembly steps, eliminates sliding wear caused by multiple operations, and enables stable operation of the engagement mechanism. be. Furthermore, the magnets 5a and 5b used as the engagement mechanism can stably supply the magnetic field necessary for extinguishing the arc 10 at the same time as ignition (the moment the pole gap opens). It can improve interrupting performance and reduce electrode wear.
  • the arc 10 is rotated in the circumferential direction of the electrode by the magnetic field created by the magnets 5a and 5b, and the current interrupting performance can be improved by cooling the arc 10.
  • the main component of the current is perpendicular to the electrode surface (in the axial direction).
  • the arc 10 rotates on the outer periphery of the first electrode 2a and the second electrode 3b because a Lorentz force in the circumferential direction is exerted by the radial magnetic field and the axial arc current generated by the magnets 5a and 5b.
  • the magnets 5a and 5b are installed in the cavities at the center of the first electrode 2a and the second electrode 3b, respectively, the magnet 5a is always located near the firing point of the arc 10 (the end of the arc 10). , 5b exist. Therefore, the magnetic field necessary for extinguishing the arc 10 can be stably supplied to the arc 10 at the same time as the electrodes are separated. Furthermore, by combining it with a magnetic material such as iron, it is possible to adjust the holding force of the magnetic engagement of the magnet.
  • the quick cut method is a technology that uses a fast-acting mechanism on one side of the electrode to increase the opening speed, thereby extending the arc to the length necessary to extinguish the arc within a time that does not cause damage to the contacts, improving breaking performance. It is.
  • the arc 10 is rotated at the same time as the electrodes are separated by the magnetic fields of the magnets 5a and 5b, and the current interrupting performance is improved, so there is no need to open the circuit at high speed, and the necessary opening speed can be reduced. Therefore, a special quick-acting mechanism is not required, the load on the spring 9 can be reduced, and the entire device can be made smaller and lighter.
  • the covers 4a and 4b may have a shape that covers not only the end face of the electrode but also the periphery thereof as shown in the figure.
  • the arc 10 is ignited on the surfaces of the first electrode 2a and the second electrode 3b, if traces of the arc 10 (scorch marks) or foreign metal objects adhere to the surfaces, the retention force of the magnetic engagement will be reduced. It will fluctuate.
  • the firing points (ends of the arc 10) on the surfaces of the first electrode 2a and the second electrode 3b can gradually move toward the outer periphery of the electrodes as they continue to rotate due to the magnetic fields of the magnets 5a and 5b. are known.
  • the outer peripheries of the first electrode 2a and the second electrode 3b are angled so as to be spaced apart from each other toward the outside of each electrode, so that traces of the arc 10 (scorch marks) and foreign metal objects can be removed.
  • the structure is such that the holding force of the magnetic engagement does not change even if it adheres.
  • FIG. 5 is a sectional view showing an open state of the switchgear according to the second embodiment.
  • the basic performance for opening the electric path is composed of a first electrode 2c and a second electrode 3d that face each other.
  • the first electrode 2c and the second electrode 3d are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b.
  • the second electrode 3d is connected to a drive device (not shown), and is capable of moving in the left and right directions in the drawing.
  • the second electrode 3d is a cylindrical column provided on the same axis, and the outer peripheral portion may be angled so as to be pulled backward.
  • the first electrode 2c is also a cylindrical cylinder provided on the same axis, but there is a hollow part in the center of the tip so that the second electrode 3d, which has a convex tip, fits together. exists. Note that this cavity has a tapered structure in which the inner diameter becomes smaller toward the bottom on the inner side.
  • a first terminal 1a and a second terminal 1b are installed outside the first electrode 2c and second electrode 3d, respectively, and are electrically connected through contacts 6c and 6d. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2e and the second electrode 3d come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
  • a magnet 5d is installed in a cavity at the center of the second electrode 3d, and is held by attaching a cover 4d.
  • a magnet 5c is installed inside the thick portion of the first electrode 2e where the cavity is located, and is held by attaching a cover 4c.
  • the magnetic pole directions of the magnets 5c and 5d are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2c and the second electrode 3d are brought into contact with each other.
  • the material of the covers 4c and 4d is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE.
  • a fixed stopper 7c is attached to the first terminal 1a, and a movable stopper 8a and a spring 9 are attached to the first electrode 2c.
  • a spring 9 is installed between the fixed stopper 7c and the movable stopper 8a, and as the first electrode 2c moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, so that the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7c does not operate and its position does not change. In this way, the first electrode 2c is fixed to the first terminal 1a by the spring 9.
  • FIG. 6 shows the opening/closing device according to the second embodiment during the circuit opening operation, and is a sectional view showing the second electrode moving to the opening position after engagement and connection due to magnetic attraction.
  • a drive device (not shown) is connected to the second electrode 3d, and opens and closes the electrode by driving the second electrode 3d in the left-right direction on the paper in FIG.
  • the contact points are the tip of the second electrode 3d and the innermost part of the cavity of the first electrode 2c.
  • the magnetic engagement is maintained by the attractive force of the magnets 5c and 5d, and even if the second electrode 3d is moved by a drive device (not shown), the contact between the electrodes is maintained.
  • the magnets 5c and 5d have a combination of directions in which an attractive force is exerted between the electrodes when the first electrode 2c and the second electrode 3d are brought into contact, but when the electrodes are separated a little after disengaging, a force in the repulsive direction is generated. Occur. Therefore, immediately after electrode dissociation, the first electrode 2c is accelerated to the left in the drawing, and the speed of circuit opening can be increased. Furthermore, since the outer diameter of the second electrode 3d can be reduced, the mass can be reduced, and the structure of the drive device that drives the second electrode 3d can be reduced.
  • FIG. 7 is a sectional view showing an open state of the switchgear according to the third embodiment.
  • the basic performance for opening the electric path is composed of a first electrode 2e and a second electrode 3f that face each other.
  • the first electrode 2e and the second electrode 3f are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b.
  • the second electrode 3f is connected to a drive device (not shown), and is capable of moving in the left-right direction in the drawing.
  • the first electrode 2e is a cylindrical column provided on the same axis, and the outer peripheral portion may be angled so as to be drawn downward.
  • the second electrode 3f is also a cylindrical cylinder provided on the same axis, but there is a hollow part in the center of the tip so that the first electrode 2e, which has a convex tip, fits together. exists. Note that this cavity has a tapered structure in which the inner diameter becomes smaller toward the bottom on the inner side.
  • a first terminal 1a and a second terminal 1b are installed outside the first electrode 2e and second electrode 3f, respectively, and are electrically connected through contacts 6e and 6f. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2e and the second electrode 3f come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
  • a magnet 5e is installed in the cavity at the center of the first electrode 2e, and is held by attaching a cover 4e.
  • a magnet 5f is installed inside the thick portion of the second electrode 3f where the cavity is located, and is held by attaching a cover 4f.
  • the magnetic pole directions of the magnets 5e and 5f are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2e and the second electrode 3f are brought into contact.
  • the material of the covers 4e and 4f is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE.
  • a fixed stopper 7e is attached to the first terminal 1a, and a movable stopper 8a and a spring 9 are attached to the first electrode 2e.
  • a spring 9 is installed between the fixed stopper 7a and the movable stopper 8a, and as the first electrode 2e moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, and the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7e does not operate and its position does not change. In this way, the first electrode 2e is fixed to the first terminal 1a by the spring 9.
  • FIG. 8 shows the switchgear according to Embodiment 3 during the opening operation, and is a sectional view showing the second electrode moving to the opening position after engagement and connection due to magnetic attraction.
  • a drive device (not shown) is connected to the second electrode 3f, and opens and closes the electrode by driving the second electrode 3f in the left-right direction on the paper in FIG.
  • the contact points are the tip of the first electrode 2e and the innermost part of the cavity of the second electrode 3f.
  • FIG. 9 is a sectional view showing an open state of the switchgear according to the fourth embodiment.
  • the basic performance for opening the electric path is composed of a first electrode 2g and a second electrode 3h that face each other.
  • the first electrode 2g and the second electrode 3h are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b.
  • the second electrode 3h is connected to a drive device (not shown), and is capable of moving in the left-right direction in the drawing.
  • the second electrode 3h is a cylindrical column provided on the same axis, and has a hemispherical tip.
  • the first electrode 2g is also a cylindrical cylinder provided on the same axis, but there is a concave hemispherical depression in the center of the tip so that the convex second electrode 3h fits together. exist.
  • the outer periphery of the first electrode 2g has rounded corners to prevent local concentration of the electric field.
  • the structures of the first electrode 2g and the second electrode 3h may have the concavo-convex shapes reversed.
  • a first terminal 1a and a second terminal 1b are installed outside the first electrode 2g and second electrode 3h, respectively, and are electrically connected through contacts 6a and 6b.
  • first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2g and the second electrode 3h come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
  • magnets 5a and 5b are installed in the cavities at the center of the first electrode 2g and the second electrode 3h, respectively.
  • the magnetic pole directions of the magnets 5a and 5b are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2g and the second electrode 3h are brought into contact.
  • a fixed stopper 7a is attached to the first terminal 1a
  • a movable stopper 8a and a spring 9 are attached to the first electrode 2a.
  • a spring 9 is installed between the fixed stopper 7a and the movable stopper 8a, and as the first electrode 2a moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, and the spring 9 is expanded and contracted. It has become.
  • the fixed stopper 7a does not operate and its position does not change. In this way, the first electrode 2a is fixed to the first terminal 1a by the spring 9.
  • FIG. 10 shows the switchgear according to Embodiment 4 during a circuit-opening operation, and is a cross-sectional view showing the second electrode moving to the circuit-opening position after engagement and connection due to magnetic attraction.
  • a drive device (not shown) is connected to the second electrode 3h, and opens and closes the electrode by driving the second electrode 3h in the left-right direction on the paper in FIG. 10. When the second electrode 3h contacts the first electrode 2g, an electric path is formed.
  • the hemispherical convex surface of the second electrode 3h and the hemispherical concave surface of the first electrode 2g are the contact points. Moreover, the magnetic engagement is maintained by the attractive force of the magnets 5a and 5b, and even if the second electrode 3h is moved by a drive device (not shown), the contact between the electrodes is maintained.
  • the fourth embodiment has a structure in which the tip of the first electrode 2g formed in an uneven shape and the tip of the second electrode 3h fit in a hemispherical shape. Therefore, even if the first electrode 2g or the second electrode 3h deviates from the axis or tilts when closing the circuit, the distance between the magnets 5a and 5b does not increase, and the engagement can be stably maintained. It is possible.
  • FIG. 11 is a sectional view showing an open state of the switchgear according to the fifth embodiment.
  • the basic performance for opening the electric path is composed of a first electrode 2a and a second electrode 3b facing each other.
  • the first electrode 2a and the second electrode 3b are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b.
  • the second electrode 3b is connected to a drive device (not shown), and is capable of moving in the horizontal direction in the drawing.
  • the first electrode 2a and the second electrode 3b are cylindrical columns provided coaxially, and the outer peripheral portions are angled so as to be drawn downward.
  • a first terminal 1a and a second terminal 1b are installed outside the first electrode 2a and the second electrode 3b, respectively, and are electrically connected through contacts 6a and 6b. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2a and the second electrode 3b come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
  • magnets 5a and 5b are installed in the cavities at the center of the first electrode 2a and the second electrode 3b, respectively, and are held by attaching covers 4a and 4b.
  • the magnetic pole directions of the magnets 5a and 5b are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2a and the second electrode 3b are brought into contact with each other.
  • the material of the covers 4a and 4b is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE.
  • magnets 11a and 11b are installed inside the first terminal 1a and the second terminal 1b, respectively, to strengthen the magnetic field strength in the radial direction between the poles.
  • the magnets 11a and 11b may be combined with a magnetic material.
  • a fixed stopper 7a is attached to the first terminal 1a, and a movable stopper 8a and a spring 9 are attached to the first electrode 2a.
  • a spring 9 is installed between the fixed stopper 7a and the movable stopper 8a, and as the first electrode 2a moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, and the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7a does not operate and its position does not change. In this way, the first electrode 2a is fixed to the first terminal 1a by the spring 9.
  • FIG. 11 shows a structure similar to that of Embodiment 1, in the structure of Embodiment 2 to 4, magnets 11a and 11b are provided inside the first terminal 1a and the second terminal 1b. You can set it up.
  • FIG. 12 shows the arc generation state when the switchgear according to the fifth embodiment opens the circuit, and is a sectional view in the middle of interrupting the arc generated between the electrodes after the engagement due to magnetic attraction is released.
  • the magnetic engagement is maintained by the attractive force of the magnets 5a and 5b installed in the center cavities of the first electrode 2a and the second electrode 3b, and the second Even if the electrodes 3b are moved by a drive device (not shown), contact between the electrodes is maintained.
  • the second electrode 3b is moved by a drive device (not shown) while the first electrode 2a and the second electrode 3b are kept in contact with each other.
  • the first electrode 2a moves to the right in the paper together with the second electrode 3b.
  • the restoring force of the spring 9 and the attractive force of the magnets 5a, 5b are balanced, the magnetic engagement is released, and the first electrode 2a and the second electrode 3b are separated by the restoring force of the spring 9.
  • an arc 10 is generated between the first electrode 2a and the second electrode 3b.
  • the generated arc 10 rotates in the circumferential direction of the electrode due to the magnetic fields created by the magnets 5a, 5b and the magnets 11a, 11b. Note that the firing point on the electrode surface (the end of the arc 10) gradually moves toward the outer periphery of the electrode as the rotation continues.
  • the arc 10 is cooled by rotating the arc 10 in the circumferential direction of the electrode using the magnetic fields created by the magnets 5a and 5b and the magnetic fields created by the magnets 11a and 11b. By doing so, the current interrupting performance can be further improved.
  • the main component of the current is perpendicular to the electrode surface (in the axial direction).
  • the arc 10 rotates on the first electrode 2a and the second electrode 3b because the Lorentz force in the circumferential direction is exerted by the radial magnetic field and the axial arc current generated by the magnets 5a, 5b and the magnets 11a, 11b. do.
  • the magnets 11a and 11b may be combined with a magnetic material.
  • the distance between the poles increases, the distance near the center of the arc 10 from the magnets 5a, 5b becomes greater, so the magnetic field strength is weaker and less susceptible to the influence of rotational drive due to magnetism. Therefore, by inserting the magnets 11a and 11b, the magnetic field strength is strengthened, and even if the distance between the poles becomes large, the arc 10 can be rotated not only at the ends but also near the center, which improves current interrupting performance. improves.
  • FIG. 13 is a sectional view showing an open state of the switchgear according to the sixth embodiment.
  • the basic performance for opening the electric path is composed of a first electrode 2a and a second electrode 3b facing each other.
  • the first electrode 2a and the second electrode 3b are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b.
  • the second electrode 3b is connected to a drive device (not shown), and is capable of moving in the horizontal direction in the drawing.
  • the first electrode 2a and the second electrode 3b are cylindrical columns provided coaxially, and the outer peripheral portions are angled so as to be drawn downward.
  • a first terminal 1a and a second terminal 1b are installed outside the first electrode 2a and the second electrode 3b, respectively, and are electrically connected through contacts 6a and 6b. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2a and the second electrode 3b come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
  • magnets 5a and 5b are installed in the cavities at the center of the first electrode 2a and the second electrode 3b, respectively, and are held by attaching covers 4a and 4b.
  • the magnetic pole directions of the magnets 5a and 5b are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2a and the second electrode 3b are brought into contact with each other.
  • the material of the covers 4a and 4b is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE.
  • a fixed stopper 7a and a limiting stopper 12 are attached to the first terminal 1a
  • a movable stopper 8c and a spring 9 are attached to the first electrode 2a.
  • a spring 9 is installed between the fixed stopper 7a and the movable stopper 8c, and as the first electrode 2a moves in the horizontal direction in the drawing, the movable stopper 8c also moves in the horizontal direction in the drawing, so that the spring 9 is expanded and contracted. It has become.
  • the fixed stopper 7a and the limit stopper 12 are fixed to the first terminal 1a and their positions do not change. In this way, the first electrode 2a is fixed to the first terminal 1a by the spring 9.
  • a restriction stopper 12 may be installed at the first terminal 1a.
  • FIG. 14 shows the opening/closing device according to the sixth embodiment during the circuit opening operation, and is a cross-sectional view when it comes into contact with the limit stopper 12 after engagement and connection due to magnetic attraction.
  • the magnetic engagement is maintained by the attractive force of the magnets 5a and 5b installed in the center cavities of the first electrode 2a and the second electrode 3b, and even if the second electrode 3b is moved by a drive device (not shown). Contact between the electrodes is maintained.
  • a spring is inserted between the movable stopper 8c attached to the first electrode 2a and the fixed stopper 7a attached to the first terminal 1a, and the movable stopper 8c moves to the right in the paper along with the first electrode 2a. By doing so, the spring 9 accumulates energy.
  • the moving stopper 8c and the limiting stopper 12, which serves as a stop portion come into contact with each other, and the spring 9 is moved at a position to the left in the drawing from the position where the restoring force of the spring 9 and the attractive forces of the magnets 5a and 5b are balanced in the first embodiment. reserves are forcibly limited. At this time, the amount of displacement that forces the spring 9 is constant, and its restoring force is smaller than the attractive force of the magnets 5a and 5b.
  • the movement stopper 8c provided on the first electrode 2a comes into contact with the limiting stopper 12 provided on the first terminal 1a, which serves as a stop portion, the first electrode 2a tries to stop moving.
  • the second electrode 3b tries to continue moving rightward in the drawing by a drive device (not shown).
  • a repulsive force acts between the first electrode 2a and the second electrode 3b by a drive device (not shown), and when this force balances the attractive force of the magnets 5a and 5b, The magnetic engagement is released.
  • the first electrode 2a begins to move to the left in the drawing due to the restoring force of the spring 9.
  • an arc 10 is generated between the first electrode 2a and the second electrode 3b if current is being applied.
  • the magnetic engagement is released when the restoring force of the spring and the attractive force of the magnets 5a and 5b are balanced.
  • the moving stopper 8c comes into contact with the limiting stopper 12 serving as a stop portion, in addition to the restoring force by the spring 9, a force is exerted in the repulsive direction by a drive device (not shown), and this force is applied to the magnet. It has a structure in which the magnetic engagement is released when the attractive forces of 5a and 5b are balanced.
  • the limiting stopper 12 the amount of change in energy storage of the spring can be reduced, deterioration of the spring 9 can be reduced, and the life of the spring can be extended. Moreover, even if the restoring force changes somewhat due to multiple operations and deterioration of the spring 9, it is possible to suppress variations in the opening speed. Furthermore, the first electrode 2a and the second electrode 3b may be caused by individual differences between the magnets 5a, 5b and the spring 9, or by the first electrode 2a or the second electrode 3b being off-axis or tilted when the circuit is closed. It is possible to suppress variations in the position at which the engagement of the second electrode 3b is released.

Landscapes

  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

This opening and closing device opens and closes a space between a first terminal (1a) and a second terminal (1b) that face each other, and comprises a first electrode (2a) provided in the first terminal, and a second electrode (3b) provided in the second terminal and driven to be able to come into contact with and separate from the first electrode. The first electrode and the second electrode come into contact with each other by attractive force between magnets (5a, 5b) disposed in the respective electrodes, and electric conduction therebetween is maintained. Since this opening and closing device is configured such that electric conduction between the electrodes is maintained by attractive force between magnets, and a magnetic field is formed around each of the electrodes, it is possible to stably supply an electric field required for arc extinguishing to an arc (10) generated by opening the space between the electrodes, and improve interruption performance.

Description

開閉装置switchgear
 本願は、電流を開閉する開閉装置に関するものである。 This application relates to a switching device that switches on and off current.
 一般的に、ガス絶縁開閉装置は、絶縁ガス(SF6ガスまたはドライエア等)を充填した容器内に遮断器、断路器、接地開閉器等の開閉機器が収納されている。各機器においては、対向した電極構造を取り、電極開離の際に生じるアークを遮断する性能が求められる。また、ガス絶縁開閉装置内部の絶縁ガスが、遮断性能の高いSF6ガスの場合は、速動の機能を付与しない並み切り方式で遮断できるものの、SF6ガスよりも遮断性能が1/100程度であるドライエアの場合は、困難となることが知られている。ここで、並み切り方式とは、電極開離の際に生じるアークを駆動装置により引き延ばすことによって電流遮断する方式である。 Generally, in a gas-insulated switchgear, switching equipment such as a circuit breaker, a disconnector, and a grounding switch are housed in a container filled with an insulating gas (SF6 gas, dry air, etc.). Each device has a structure in which electrodes face each other, and is required to have the ability to interrupt the arc that occurs when the electrodes are separated. Additionally, if the insulating gas inside the gas-insulated switchgear is SF6 gas, which has high breaking performance, it can be shut off using a standard method that does not provide a quick-acting function, but the breaking performance is about 1/100 of that of SF6 gas. Dry air is known to be difficult. Here, the straight line method is a method in which the current is interrupted by extending the arc generated when the electrodes are separated using a drive device.
 電流遮断性能を向上させる技術として、早切り方式と磁気駆動方式が知られている。早切り方式は、電極の片側に速動機構を備え、開路速度を上昇させることにより、接点の損傷が生じない時間内で消弧に必要な長さにまでアークを伸ばして遮断性能を得る技術である。特に、特許文献1では、設置スペースの裕度と無関係に速動機構を設置できるように、バネを用いて、雄側係合器と雌側係合器とが機械的に接続および解除することで、速動機構を固定側電極側に設ける構造を実現した。また、磁気駆動方式は、特許文献1の記載のように開閉装置内に磁石を設置することで、電流遮断時に発生するアークを磁気駆動して遮断する方式である。 The quick cut method and magnetic drive method are known as technologies for improving current interrupting performance. The quick-cutting method is a technology that uses a quick-acting mechanism on one side of the electrode to increase the opening speed, thereby extending the arc to the length necessary to extinguish the arc within the time that does not cause damage to the contacts, and achieving breaking performance. It is. In particular, in Patent Document 1, the male engagement device and the female engagement device are mechanically connected and disconnected using a spring so that the quick-acting mechanism can be installed regardless of the margin of installation space. In this way, we realized a structure in which the quick-acting mechanism is installed on the fixed electrode side. Further, the magnetic drive method is a method in which a magnet is installed in the switchgear as described in Patent Document 1, and the arc generated when the current is interrupted is magnetically driven and interrupted.
特開2010-027479号公報Japanese Patent Application Publication No. 2010-027479
 しかしながら、特許文献1では係合器を利用した機械的な係合機構を採用しているため、構造が複雑になり加工コストおよび組立工程の増加する、さらに多数回動作による摺動摩耗により係合不良が発生するという課題があった。
 また、特許文献1では、固定側端子の先端付近の位置で雄側係合器と雌側係合器とが機械的に接続され、可動側電極に追随して、固定側電極は固定側端子に対向して配置された可動側端子の方向へ移動を開始する。電極移動中にバネの復元力と係合器の摩擦力がつり合い、接続が解除される。固定側電極外部に配置された固定側端子の内部に磁石が挿入されており、電極の開離位置(初期のアーク点弧位置)は、固定側端子および磁石から離れた位置となる。磁石が生成する磁界強度は、磁石から距離が離れるほど小さくなるため、電極開離直後から固定側電極が一定距離に到達するまでの間は、アークを磁気駆動するために十分な磁界強度を得ることできないという課題があった。
However, since Patent Document 1 adopts a mechanical engagement mechanism using an engagement device, the structure is complicated, processing costs and assembly steps are increased, and the engagement is caused by sliding wear due to multiple operations. There was a problem that defects occurred.
Further, in Patent Document 1, the male side engager and the female side engager are mechanically connected at a position near the tip of the fixed side terminal, and the fixed side electrode follows the movable side electrode. It starts moving in the direction of the movable side terminal which is arranged opposite to. While the electrode is moving, the restoring force of the spring and the frictional force of the engagement device are balanced and the connection is released. A magnet is inserted inside a fixed terminal arranged outside the fixed electrode, and the electrode opening position (initial arc ignition position) is a position away from the fixed terminal and the magnet. The strength of the magnetic field generated by the magnet decreases as the distance from the magnet increases, so from immediately after the electrodes open until the fixed electrode reaches a certain distance, the field strength is sufficient to magnetically drive the arc. The problem was that it was impossible to do so.
 本願は、上記のような課題を解決するためになされたものである。簡単な構造で、アークの発生に対し、磁石による消弧のため十分な磁界強度を有し、遮断性能の高い開閉装置を得ることを目的とする。 This application has been made in order to solve the above problems. The object of the present invention is to obtain a switchgear having a simple structure, having sufficient magnetic field strength to extinguish the arc generated by a magnet, and having high interrupting performance.
 本願に係わる開閉装置は、対向配置された第一の端子と第二の端子の間を開閉する開閉装置であって、前記第一の端子に設けられた第一の電極と、前記第二の端子に設けられ、前記第一の電極と接離可能に駆動される第二の電極と、を備え、前記第一の電極と前記第二の電極とは、各電極の内部に配置された磁石の引力により接触し、導通が保持されるように構成されたものである。 The switching device according to the present application is a switching device that opens and closes between a first terminal and a second terminal that are arranged opposite to each other. a second electrode provided on a terminal and driven so as to be able to come into contact with and separate from the first electrode; the first electrode and the second electrode are magnets disposed inside each electrode; They are constructed so that they come into contact and maintain continuity due to the attractive force of the two.
 本願によれば、第一の電極と第二の電極の内部の磁石の引力で、導通が保持されるように構成されており、互いの電極の周りには磁界が構成されているので、点弧(極間が開いた瞬間)と同時に、アークに対して消孤のために必要な磁界を安定して供給することができ、遮断性能を向上させることができる。また、複雑な係合機構がないので、構造を簡素化でき加工コストおよび組立工程を削減できる。 According to the present application, the first electrode and the second electrode are configured to be electrically connected by the attractive force of the magnets inside them, and since a magnetic field is formed around each electrode, the point At the same time as the arc (the moment when the gap between the poles opens), it is possible to stably supply the magnetic field necessary for extinguishing the arc, thereby improving the interrupting performance. Furthermore, since there is no complicated engagement mechanism, the structure can be simplified and processing costs and assembly steps can be reduced.
実施の形態1に係わる開閉装置の開路状態を示す断面図である。FIG. 3 is a sectional view showing an open state of the switchgear according to the first embodiment. 実施の形態1に係わる開閉装置の閉路状態を示す断面図である。FIG. 2 is a cross-sectional view showing a closed circuit state of the switchgear according to the first embodiment. 実施の形態1に係わる開閉装置の開路動作中を示す断面図である。FIG. 2 is a cross-sectional view showing the switchgear according to the first embodiment during a circuit opening operation. 実施の形態1に係わる開閉装置の開路時のアーク発生状態を示す断面図である。FIG. 3 is a cross-sectional view showing an arc generation state when the switchgear according to the first embodiment is opened. 実施の形態2に係わる開閉装置の開路状態を示す断面図である。FIG. 7 is a sectional view showing an open state of the switchgear according to the second embodiment. 実施の形態2に係わる開閉装置の開路動作中を示す断面図である。FIG. 7 is a sectional view showing the switchgear according to the second embodiment during a circuit-opening operation. 実施の形態3に係わる開閉装置の開路状態を示す断面図である。FIG. 7 is a cross-sectional view showing an open state of the switchgear according to Embodiment 3; 実施の形態3に係わる開閉装置の開路動作中を示す断面図である。FIG. 7 is a cross-sectional view showing the switchgear according to Embodiment 3 during a circuit-opening operation. 実施の形態4に係わる開閉装置の開路状態を示す断面図である。FIG. 7 is a sectional view showing an open state of the switchgear according to the fourth embodiment. 実施の形態4に係わる開閉装置の開路動作中を示す断面図である。FIG. 7 is a cross-sectional view showing the switchgear according to the fourth embodiment during a circuit opening operation. 実施の形態5に係わる開閉装置の開路状態を示す断面図である。FIG. 7 is a sectional view showing an open state of the switchgear according to the fifth embodiment. 実施の形態5に係わる開閉装置の開路時のアーク発生状態を示す断面図である。FIG. 9 is a cross-sectional view showing an arc generation state when the switchgear according to the fifth embodiment is opened; 実施の形態6に係わる開閉装置の開路状態を示す断面図である。FIG. 7 is a sectional view showing an open state of the switchgear according to the sixth embodiment. 実施の形態6に係わる開閉装置の開路動作中を示す断面図である。FIG. 7 is a sectional view showing the switchgear according to the sixth embodiment during a circuit-opening operation.
実施の形態1.
 本願の実施の形態1の構成について図1を用いて説明する。図1は実施の形態1に係る開閉装置の開路状態を示す断面図である。電路を開くための基本性能は対向した第一の電極2aおよび第二の電極3bから構成される。第一の電極2aおよび第二の電極3bは、第一の端子1aおよび第二の端子1bに対して同軸上で動くよう図示しないガイド部品等で保持されている。また、第二の電極3bは図示しない駆動装置に接続されており、紙面左右方向に駆動動作できるものとする。第一の電極2aおよび第二の電極3bは、同軸上に設けられた筒状円柱であり、外周部は、後方に引き下がるように角度がついている。第一の電極2aおよび第二の電極3bの外部には、それぞれ第一の端子1aおよび第二の端子1bが設置され、接触子6a、6bによって導通している。なお、第一の端子1aおよび第二の端子1bは、図示しない他機器と接続されており、第一の電極2aおよび第二の電極3bが接触した時に通電経路が形成され、電力を伝送する。さらに、電界緩和およびアークによる損傷から電極を守る効果も備えている。
Embodiment 1.
The configuration of Embodiment 1 of the present application will be explained using FIG. 1. FIG. 1 is a sectional view showing an open state of the switchgear according to the first embodiment. The basic performance for opening the electric path is composed of a first electrode 2a and a second electrode 3b facing each other. The first electrode 2a and the second electrode 3b are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b. Further, the second electrode 3b is connected to a drive device (not shown), and can be driven in the left-right direction in the drawing. The first electrode 2a and the second electrode 3b are cylindrical columns provided coaxially, and the outer peripheral portions are angled so as to be drawn downward. A first terminal 1a and a second terminal 1b are installed outside the first electrode 2a and the second electrode 3b, respectively, and are electrically connected through contacts 6a and 6b. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2a and the second electrode 3b come into contact, a current-carrying path is formed and power is transmitted. . It also has the effect of relaxing the electric field and protecting the electrodes from damage caused by arcing.
 また、第一の電極2aおよび第二の電極3bの中心部の空洞にはそれぞれ磁石5a、5bが設置され、各磁石が対向する面にカバー4a、4bを取り付けることで保持されている。ここで、磁石5a、5bの磁極方向は、第一の電極2aおよび第二の電極3bを接触させた時に、電極間に引力が働く方向の組み合わせとする。カバー4a、4bの材質は、銅タングステン等の非磁性の金属材料、あるいはPTFE(ポリテトラフルオロエチレン)等の樹脂材料とする。
 さらに、第一の端子1aには、固定ストッパー7aが取り付けられ、第一の電極2aには、移動ストッパー8aおよびバネ9が取り付けられている。固定ストッパー7aおよび移動ストッパー8aの間にバネ9が設置されており、第一の電極2aが紙面左右方向に動作するとともに、移動ストッパー8aも紙面左右方向に動作し、バネ9を伸縮する構造となっている。この時、固定ストッパー7aは移動せず、位置は変わらないものとする。このように第一の電極2aはバネ9によって第一の端子1aに繋止されている。
Further, magnets 5a and 5b are installed in the cavities at the center of the first electrode 2a and the second electrode 3b, respectively, and are held by attaching covers 4a and 4b to the surfaces facing each magnet. Here, the magnetic pole directions of the magnets 5a and 5b are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2a and the second electrode 3b are brought into contact with each other. The material of the covers 4a and 4b is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE (polytetrafluoroethylene).
Further, a fixed stopper 7a is attached to the first terminal 1a, and a movable stopper 8a and a spring 9 are attached to the first electrode 2a. A spring 9 is installed between the fixed stopper 7a and the movable stopper 8a, and as the first electrode 2a moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, and the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7a does not move and its position does not change. In this way, the first electrode 2a is fixed to the first terminal 1a by the spring 9.
 次に実施の形態1の動作について図1から図4までを用いて説明する。図1は実施の形態1に係る開閉装置の開路状態を示す。図示しない駆動装置が第二の電極3bに接続されており、図1において紙面左右方向に第二の電極3bを駆動することで電極を開路および閉路する。
 図2は実施の形態1に係る開閉装置の閉路状態を示し、第二の電極3bが投入されている時の断面図である。第二の電極3bが第一の電極2aと接触すると電路が形成される。この時、図示しない他機器と接続された第一の端子1aに流入した電力は、接触子6aを通り、第一の電極2aへ伝送され、接触した第二の電極3bを通り、接触子6b、第二の端子1bへと流れていき、他機器へと電力を伝送することができる。
 また、第一の電極2aおよび第二の電極3bは、中心部の空洞に設置された磁石5a、5bの磁気の引力により係合して接続され、第二の電極3bが図示しない駆動装置によって紙面右方向へ移動しても電極間の接触が維持され、導通が保持される。
Next, the operation of the first embodiment will be explained using FIGS. 1 to 4. FIG. 1 shows an open state of the switchgear according to the first embodiment. A drive device (not shown) is connected to the second electrode 3b, and opens and closes the electrode by driving the second electrode 3b in the left-right direction on the paper in FIG.
FIG. 2 shows a closed circuit state of the switchgear according to the first embodiment, and is a sectional view when the second electrode 3b is inserted. When the second electrode 3b contacts the first electrode 2a, an electric path is formed. At this time, the power flowing into the first terminal 1a connected to another device (not shown) passes through the contact 6a, is transmitted to the first electrode 2a, passes through the contacted second electrode 3b, and is transferred to the contact 6b. , flows to the second terminal 1b, and can transmit power to other equipment.
Further, the first electrode 2a and the second electrode 3b are engaged and connected by the magnetic attraction of magnets 5a and 5b installed in the central cavity, and the second electrode 3b is connected by a driving device (not shown). Even when moving to the right in the paper, contact between the electrodes is maintained and conduction is maintained.
 図3は実施の形態1に係る開閉装置の開路動作中を示すものであり、磁気の引力による係合、接続後に第二の電極3bを開路位置へ移動する途中の断面図である。磁気の引力による係合が維持され、第一の電極2aおよび第二の電極3bの接触が保持された状態で、図示しない駆動装置によって第二の電極3bを紙面右方向に駆動すると、第二の電極3bとともに第一の電極2aが紙面右方向に移動する。この時、第一の電極2aに取り付けられた移動ストッパー8aも紙面右方向に移動するため、バネ9が蓄勢する。なお、固定ストッパー7aは第一の端子1aに取り付けられているため移動せず、位置は変わらないものとする。第二の電極3bを紙面右方向に駆動するほどバネ9の復元力が大きくなる。バネ9の復元力と磁石5a、5bの引力とが釣り合ったときに、磁気による係合が解除され、バネ9の復元力により、第一の電極2aおよび第二の電極3bが開離する。
 このように開閉装置の開路は、導通を保持したまま開路方向に駆動される第二の電極3bと第一の電極2aとの間の磁石5a、5bの引力と、第一の電極2aを繋止するバネ9の復元力と、を利用したものである。
FIG. 3 shows the opening/closing device according to the first embodiment during the opening operation, and is a cross-sectional view of the second electrode 3b moving to the opening position after engagement and connection due to magnetic attraction. When the second electrode 3b is driven to the right in the drawing by a drive device (not shown) while the engagement by magnetic attraction is maintained and the contact between the first electrode 2a and the second electrode 3b is maintained, the second electrode 2a and the second electrode 3b are driven to the right in the drawing. The first electrode 2a moves to the right in the paper along with the electrode 3b. At this time, the movement stopper 8a attached to the first electrode 2a also moves to the right in the drawing, so the spring 9 stores energy. It is assumed that the fixed stopper 7a does not move because it is attached to the first terminal 1a and its position does not change. The more the second electrode 3b is driven to the right in the drawing, the greater the restoring force of the spring 9 becomes. When the restoring force of the spring 9 and the attractive force of the magnets 5a, 5b are balanced, the magnetic engagement is released, and the restoring force of the spring 9 separates the first electrode 2a and the second electrode 3b.
In this way, the opening of the switchgear is achieved by connecting the first electrode 2a and the attractive force of the magnets 5a, 5b between the second electrode 3b and the first electrode 2a, which are driven in the opening direction while maintaining continuity. This utilizes the restoring force of the spring 9 that stops.
 図4は実施の形態1に係る開閉装置の開路時において、磁気による係合が解除された後に電極間に発生したアークを遮断する途中の状態を示す断面図である。バネ9の復元力と磁石5a、5bの引力とが釣り合い、磁気による係合が解除され、バネ9の復元力により、第一の電極2aおよび第二の電極3bが開離した後、通電中であれば第一の電極2aおよび第二の電極3bの間にアーク10が発生する。発生したアーク10は、磁石5a、5bが作る磁界により、電極の円周方向に回転する。なお、電極表面の発弧点(アーク10の端部)は回転を続けると徐々に電極外周部へと移動していく。第二の電極3bは、図示しない駆動装置によって開路位置に戻り、第一の電極2aは、バネ9の復元力により、紙面左右方向に微小振動を繰り返した後、開路位置に戻る。 FIG. 4 is a cross-sectional view showing a state in which the arc generated between the electrodes is interrupted after the magnetic engagement is released when the switchgear according to the first embodiment is opened. After the restoring force of the spring 9 and the attractive force of the magnets 5a and 5b are balanced, the magnetic engagement is released, and the first electrode 2a and the second electrode 3b are separated due to the restoring force of the spring 9, during energization. If so, an arc 10 is generated between the first electrode 2a and the second electrode 3b. The generated arc 10 rotates in the circumferential direction of the electrode due to the magnetic field created by the magnets 5a and 5b. Note that the firing point on the electrode surface (the end of the arc 10) gradually moves toward the outer periphery of the electrode as the rotation continues. The second electrode 3b returns to the open position by a drive device (not shown), and the first electrode 2a returns to the open position after repeating minute vibrations in the horizontal direction in the drawing due to the restoring force of the spring 9.
 本願は、第一の電極2aおよび第二の電極3bの中心部の空洞に設置された磁石5a、5bの引力によって磁気的に係合接続する構造である。そのため、構造が簡素であり、複雑構造の係合器が不要であるため、加工コストおよび組立工程の低減、多数回動作による摺動摩耗が発生せず、安定した係合機構の動作が可能である。さらに、係合機構として使用する磁石5a、5bによって、点弧(極間が開いた瞬間)と同時に、アーク10に対して消孤のために必要な磁界を安定して供給することができ、遮断性能を向上するとともに電極損耗を低減できる。 The present application has a structure in which the first electrode 2a and the second electrode 3b are magnetically engaged and connected by the attractive force of magnets 5a and 5b installed in a cavity at the center. Therefore, the structure is simple and does not require a complex structure of the engagement device, which reduces processing costs and assembly steps, eliminates sliding wear caused by multiple operations, and enables stable operation of the engagement mechanism. be. Furthermore, the magnets 5a and 5b used as the engagement mechanism can stably supply the magnetic field necessary for extinguishing the arc 10 at the same time as ignition (the moment the pole gap opens). It can improve interrupting performance and reduce electrode wear.
 また、磁石5a、5bが作る磁界により、アーク10を電極の円周方向に回転させ、アーク10を冷却することで電流遮断性能を向上することができる。アーク10発生時、電流は電極表面に対して垂直方向(軸方向)の成分が主となる。磁石5a、5bが作る放射状方向の磁界と軸方向のアーク電流によって、円周方向のローレンツ力が働くため、アーク10は第一の電極2aおよび第二の電極3bの外周上を回転する。 In addition, the arc 10 is rotated in the circumferential direction of the electrode by the magnetic field created by the magnets 5a and 5b, and the current interrupting performance can be improved by cooling the arc 10. When the arc 10 occurs, the main component of the current is perpendicular to the electrode surface (in the axial direction). The arc 10 rotates on the outer periphery of the first electrode 2a and the second electrode 3b because a Lorentz force in the circumferential direction is exerted by the radial magnetic field and the axial arc current generated by the magnets 5a and 5b.
 本願では、第一の電極2aおよび第二の電極3bの中心部の空洞にそれぞれ磁石5a、5bが設置されているため、常にアーク10の発弧点(アーク10の端部)付近に磁石5a、5bが存在する。そのため、電極が開離すると同時にアーク10に対して消孤のために必要な磁界を安定して供給することができる。また、鉄などの磁性体と組み合わせることで、磁石の磁気による係合の保持力を調整することができる。 In the present application, since the magnets 5a and 5b are installed in the cavities at the center of the first electrode 2a and the second electrode 3b, respectively, the magnet 5a is always located near the firing point of the arc 10 (the end of the arc 10). , 5b exist. Therefore, the magnetic field necessary for extinguishing the arc 10 can be stably supplied to the arc 10 at the same time as the electrodes are separated. Furthermore, by combining it with a magnetic material such as iron, it is possible to adjust the holding force of the magnetic engagement of the magnet.
 電流遮断性能を向上する技術の1つとして早切り方式がある。この方式は、電極の片側に速動機構を備え、開路速度を上昇させることにより、接点の損傷が生じない時間内で消弧に必要な長さにまでアークを伸ばして遮断性能を向上させる技術である。本願では、磁石5a、5bの磁界によって、電極が開離すると同時にアーク10を回転させ、電流遮断性能が向上するため、高速で開路させる必要がなくなり、必要な開路速度を低減することができる。したがって、特別な速動機構を必要とせず、バネ9の荷重も低減することができ、機器全体の小型軽量化が可能である。 One of the technologies to improve current interrupting performance is the quick cut method. This method is a technology that uses a fast-acting mechanism on one side of the electrode to increase the opening speed, thereby extending the arc to the length necessary to extinguish the arc within a time that does not cause damage to the contacts, improving breaking performance. It is. In the present application, the arc 10 is rotated at the same time as the electrodes are separated by the magnetic fields of the magnets 5a and 5b, and the current interrupting performance is improved, so there is no need to open the circuit at high speed, and the necessary opening speed can be reduced. Therefore, a special quick-acting mechanism is not required, the load on the spring 9 can be reduced, and the entire device can be made smaller and lighter.
 また、磁石5a、5bを保持するカバー4a、4bの材質に、鉄などの磁性材料を用いた場合には、カバー4a、4b表面の磁界が強いためアーク10によって発生する磁性材料の異物が付着しやすく、係合が不安定になる可能性がある。そのため、銅タングステン等の非磁性の金属材料、あるいはPTFE等の樹脂材料を採用することで、異物の付着を抑え、安定して係合することができる。さらに、PTFEなどの樹脂材料の場合は、樹脂材料がアーク10に直接接触すること、アーク10の放射光と接触することによって、樹脂材料から発生するアブレーションガスがアーク10を冷却(アブレーション冷却)し、電流遮断性能を向上させる。さらに、PTFEなどの樹脂材料は熱伝導率が低いため、磁石5a、5bに対して、アーク10の熱が伝達され、熱減磁されることを抑制するという効果もある。また、カバー4a、4bは同図のように電極の端面だけでなく、その周辺を覆うような形状としてもよい。 Furthermore, if a magnetic material such as iron is used for the covers 4a and 4b that hold the magnets 5a and 5b, foreign matter of the magnetic material generated by the arc 10 will adhere due to the strong magnetic field on the surfaces of the covers 4a and 4b. This may cause the engagement to become unstable. Therefore, by employing a non-magnetic metal material such as copper tungsten or a resin material such as PTFE, it is possible to suppress the attachment of foreign substances and achieve stable engagement. Furthermore, in the case of a resin material such as PTFE, the ablation gas generated from the resin material cools the arc 10 (ablation cooling) when the resin material comes into direct contact with the arc 10 or with the emitted light of the arc 10. , improve current interrupting performance. Furthermore, since a resin material such as PTFE has a low thermal conductivity, the heat of the arc 10 is transferred to the magnets 5a and 5b, which also has the effect of suppressing thermal demagnetization. Further, the covers 4a and 4b may have a shape that covers not only the end face of the electrode but also the periphery thereof as shown in the figure.
 さらに、第一の電極2aおよび第二の電極3bの表面には、アーク10が点弧するため、アーク10の痕跡(焦げ跡)および金属異物等が付着すると、磁気による係合の保持力が変動してしまう。第一の電極2aおよび第二の電極3bの表面の発弧点(アーク10の端部)は、磁石5a、5bの磁界による回転を続けると徐々に電極外周部へと移動していくことが知られている。そのため、第一の電極2aおよび第二の電極3bの外周部は、各電極の外側に向かってに互いに離間するように角度がつけられており、アーク10の痕跡(焦げ跡)および金属異物等が付着しても磁気による係合の保持力が変動しない構造となっている。 Furthermore, since the arc 10 is ignited on the surfaces of the first electrode 2a and the second electrode 3b, if traces of the arc 10 (scorch marks) or foreign metal objects adhere to the surfaces, the retention force of the magnetic engagement will be reduced. It will fluctuate. The firing points (ends of the arc 10) on the surfaces of the first electrode 2a and the second electrode 3b can gradually move toward the outer periphery of the electrodes as they continue to rotate due to the magnetic fields of the magnets 5a and 5b. Are known. Therefore, the outer peripheries of the first electrode 2a and the second electrode 3b are angled so as to be spaced apart from each other toward the outside of each electrode, so that traces of the arc 10 (scorch marks) and foreign metal objects can be removed. The structure is such that the holding force of the magnetic engagement does not change even if it adheres.
実施の形態2.
 図5は実施の形態2に係る開閉装置の開路状態を示す断面図である。電路を開くための基本性能は対向した第一の電極2cおよび第二の電極3dから構成される。第一の電極2cおよび第二の電極3dは、第一の端子1aおよび第二の端子1bに対して同軸上で動くよう図示しないガイド部品等で保持されている。また、第二の電極3dは図示しない駆動装置に接続されており、紙面左右方向に動作できるものとする。第二の電極3dは同軸上に設けられた筒状円柱であり、外周部は後方に引き下がるように角度がついていてもよい。第一の電極2cも同軸上に設けられた筒状円柱であるが、先端部が凸形状となる第二の電極3dが篏合するように、先端部の中心部に凹形状となる空洞部が存在する。なお、この空洞部は、奥側の底部に行くほど内径が小さくなるようなテーパー構造となっている。第一の電極2cおよび第二の電極3dの外部には、それぞれ第一の端子1aおよび第二の端子1bが設置され、接触子6c、6dによって導通している。なお、第一の端子1aおよび第二の端子1bは、図示しない他機器と接続されており、第一の電極2eおよび第二の電極3dが接触した時に通電経路が形成され、電力を伝送する。さらに、電界緩和およびアーク10による損傷から電極を守る効果も備えている。
Embodiment 2.
FIG. 5 is a sectional view showing an open state of the switchgear according to the second embodiment. The basic performance for opening the electric path is composed of a first electrode 2c and a second electrode 3d that face each other. The first electrode 2c and the second electrode 3d are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b. Further, the second electrode 3d is connected to a drive device (not shown), and is capable of moving in the left and right directions in the drawing. The second electrode 3d is a cylindrical column provided on the same axis, and the outer peripheral portion may be angled so as to be pulled backward. The first electrode 2c is also a cylindrical cylinder provided on the same axis, but there is a hollow part in the center of the tip so that the second electrode 3d, which has a convex tip, fits together. exists. Note that this cavity has a tapered structure in which the inner diameter becomes smaller toward the bottom on the inner side. A first terminal 1a and a second terminal 1b are installed outside the first electrode 2c and second electrode 3d, respectively, and are electrically connected through contacts 6c and 6d. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2e and the second electrode 3d come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
 また、第二の電極3dの中心部の空洞には磁石5dが設置され、カバー4dを取り付けることで保持されている。また、第一の電極2eの空洞部がある肉厚部分の内部には磁石5cが設置され、カバー4cを取り付けることで保持されている。ここで、磁石5c、5dの磁極方向は、第一の電極2cおよび第二の電極3dを接触させた時に、電極間に引力が働く方向の組み合わせとする。カバー4c、4dの材質は、銅タングステン等の非磁性の金属材料、あるいはPTFE等の樹脂材料とする。
 さらに、第一の端子1aには、固定ストッパー7cが取り付けられ、第一の電極2cには、移動ストッパー8aおよびバネ9が取り付けられている。固定ストッパー7cおよび移動ストッパー8aの間にバネ9が設置されており、第一の電極2cが紙面左右方向に動作するとともに、移動ストッパー8aも紙面左右方向に動作し、バネ9を伸縮する構造となっている。この時、固定ストッパー7cは動作せず、位置は変わらないものとする。このように第一の電極2cはバネ9によって第一の端子1aに繋止されている。
Further, a magnet 5d is installed in a cavity at the center of the second electrode 3d, and is held by attaching a cover 4d. Further, a magnet 5c is installed inside the thick portion of the first electrode 2e where the cavity is located, and is held by attaching a cover 4c. Here, the magnetic pole directions of the magnets 5c and 5d are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2c and the second electrode 3d are brought into contact with each other. The material of the covers 4c and 4d is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE.
Further, a fixed stopper 7c is attached to the first terminal 1a, and a movable stopper 8a and a spring 9 are attached to the first electrode 2c. A spring 9 is installed between the fixed stopper 7c and the movable stopper 8a, and as the first electrode 2c moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, so that the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7c does not operate and its position does not change. In this way, the first electrode 2c is fixed to the first terminal 1a by the spring 9.
 実施の形態2の動作については、基本的に実施の形態1と同様であるが、第一の電極2cおよび第二の電極3dの接触箇所と磁気による係合の動作について図6を用いて詳しく説明する。図6は、実施の形態2に係る開閉装置の開路動作中を示すものであり、磁気の引力による係合、接続後に第二の電極を開路位置へ移動する途中の断面図である。図示しない駆動装置が第二の電極3dに接続されており、図6において紙面左右方向に第二の電極3dを駆動することで電極を開路および閉路する。第二の電極3dが第一の電極2cと接触すると電路が形成される。この時、接触箇所は、第二の電極3dの先端と、第一の電極2cの空洞部の最奥部である。また、磁石5c、5dの引力によって磁気による係合が維持され、第二の電極3dが図示しない駆動装置によって移動しても電極間の接触が保持される。 The operation of the second embodiment is basically the same as that of the first embodiment, but the contact points of the first electrode 2c and the second electrode 3d and the operation of magnetic engagement will be explained in detail using FIG. explain. FIG. 6 shows the opening/closing device according to the second embodiment during the circuit opening operation, and is a sectional view showing the second electrode moving to the opening position after engagement and connection due to magnetic attraction. A drive device (not shown) is connected to the second electrode 3d, and opens and closes the electrode by driving the second electrode 3d in the left-right direction on the paper in FIG. When the second electrode 3d contacts the first electrode 2c, an electric path is formed. At this time, the contact points are the tip of the second electrode 3d and the innermost part of the cavity of the first electrode 2c. Moreover, the magnetic engagement is maintained by the attractive force of the magnets 5c and 5d, and even if the second electrode 3d is moved by a drive device (not shown), the contact between the electrodes is maintained.
 実施の形態1の効果に加えて、次の効果がある。磁石5c、5dは第一の電極2cおよび第二の電極3dを接触させた時に、電極間に引力が働く方向の組み合わせであるが、係合解除後に電極が少し離れると、反発方向の力が発生する。そのため、電極解離直後に第一の電極2cが紙面左方向に加速され、開路の速度を上昇することができる。また、第二の電極3dの外径を小さくできるため、質量が小さくなり、第二の電極3dを駆動する駆動装置の構造を縮小することができる。 In addition to the effects of Embodiment 1, there are the following effects. The magnets 5c and 5d have a combination of directions in which an attractive force is exerted between the electrodes when the first electrode 2c and the second electrode 3d are brought into contact, but when the electrodes are separated a little after disengaging, a force in the repulsive direction is generated. Occur. Therefore, immediately after electrode dissociation, the first electrode 2c is accelerated to the left in the drawing, and the speed of circuit opening can be increased. Furthermore, since the outer diameter of the second electrode 3d can be reduced, the mass can be reduced, and the structure of the drive device that drives the second electrode 3d can be reduced.
実施の形態3.
 図7は実施の形態3に係る開閉装置の開路状態を示す断面図である。電路を開くための基本性能は対向した第一の電極2eおよび第二の電極3fから構成される。第一の電極2eおよび第二の電極3fは、第一の端子1aおよび第二の端子1bに対して同軸上で動くよう図示しないガイド部品等で保持されている。また、第二の電極3fは図示しない駆動装置に接続されており、紙面左右方向に動作できるものとする。第一の電極2eは同軸上に設けられた筒状円柱であり、外周部は後方に引き下がるように角度がついていてもよい。第二の電極3fも同軸上に設けられた筒状円柱であるが、先端部が凸形状となる第一の電極2eが篏合するように、先端部の中心部に凹形状となる空洞部が存在する。なお、この空洞部は、奥側の底部に行くほど内径が小さくなるようなテーパー構造となっている。第一の電極2eおよび第二の電極3fの外部には、それぞれ第一の端子1aおよび第二の端子1bが設置され、接触子6e、6fによって導通している。なお、第一の端子1aおよび第二の端子1bは、図示しない他機器と接続されており、第一の電極2eおよび第二の電極3fが接触した時に通電経路が形成され、電力を伝送する。さらに、電界緩和およびアーク10による損傷から電極を守る効果も備えている。
Embodiment 3.
FIG. 7 is a sectional view showing an open state of the switchgear according to the third embodiment. The basic performance for opening the electric path is composed of a first electrode 2e and a second electrode 3f that face each other. The first electrode 2e and the second electrode 3f are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b. Further, the second electrode 3f is connected to a drive device (not shown), and is capable of moving in the left-right direction in the drawing. The first electrode 2e is a cylindrical column provided on the same axis, and the outer peripheral portion may be angled so as to be drawn downward. The second electrode 3f is also a cylindrical cylinder provided on the same axis, but there is a hollow part in the center of the tip so that the first electrode 2e, which has a convex tip, fits together. exists. Note that this cavity has a tapered structure in which the inner diameter becomes smaller toward the bottom on the inner side. A first terminal 1a and a second terminal 1b are installed outside the first electrode 2e and second electrode 3f, respectively, and are electrically connected through contacts 6e and 6f. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2e and the second electrode 3f come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
 また、第一の電極2eの中心部の空洞には磁石5eが設置され、カバー4eを取り付けることで保持されている。また、第二の電極3fの空洞部がある肉厚部分の内部には磁石5fが設置され、カバー4fを取り付けることで保持されている。ここで、磁石5e、5fの磁極方向は、第一の電極2eおよび第二の電極3fを接触させた時に、電極間に引力が働く方向の組み合わせとする。カバー4e、4fの材質は、銅タングステン等の非磁性の金属材料、あるいはPTFE等の樹脂材料とする。
 さらに、第一の端子1aには、固定ストッパー7eが取り付けられ、第一の電極2eには、移動ストッパー8aおよびバネ9が取り付けられている。固定ストッパー7aおよび移動ストッパー8aの間にバネ9が設置されており、第一の電極2eが紙面左右方向に動作するとともに、移動ストッパー8aも紙面左右方向に動作し、バネ9を伸縮する構造となっている。この時、固定ストッパー7eは動作せず、位置は変わらないものとする。このように第一の電極2eはバネ9によって第一の端子1aに繋止されている。
Further, a magnet 5e is installed in the cavity at the center of the first electrode 2e, and is held by attaching a cover 4e. Further, a magnet 5f is installed inside the thick portion of the second electrode 3f where the cavity is located, and is held by attaching a cover 4f. Here, the magnetic pole directions of the magnets 5e and 5f are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2e and the second electrode 3f are brought into contact. The material of the covers 4e and 4f is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE.
Further, a fixed stopper 7e is attached to the first terminal 1a, and a movable stopper 8a and a spring 9 are attached to the first electrode 2e. A spring 9 is installed between the fixed stopper 7a and the movable stopper 8a, and as the first electrode 2e moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, and the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7e does not operate and its position does not change. In this way, the first electrode 2e is fixed to the first terminal 1a by the spring 9.
 実施の形態3の動作については、基本的に実施の形態1と同様であるが、第一の電極2eおよび第二の電極3fの接触箇所と磁気による係合の動作について図8を用いて詳しく説明する。図8は、実施の形態3に係る開閉装置の開路動作中を示すものであり、磁気の引力による係合、接続後に第二の電極を開路位置へ移動する途中の断面図である。図示しない駆動装置が第二の電極3fに接続されており、図8において紙面左右方向に第二の電極3fを駆動することで電極を開路および閉路する。第二の電極3fが第一の電極2eと接触すると電路が形成される。この時、接触箇所は、第一の電極2eの先端と、第二の電極3fの空洞部の最奥部である。また、磁石5e、5fの引力によって磁気による係合が接続され、第二の電極3fが図示しない駆動装置によって移動しても電極間の接触が保持される。
 実施の形態1および2の効果に加えて、第一の電極2eの外径を小さくできるため、質量が小さくなり、第一の電極2eを繋止するバネ9を縮小することができる。
The operation of the third embodiment is basically the same as that of the first embodiment, but the contact points of the first electrode 2e and the second electrode 3f and the operation of magnetic engagement will be explained in detail using FIG. explain. FIG. 8 shows the switchgear according to Embodiment 3 during the opening operation, and is a sectional view showing the second electrode moving to the opening position after engagement and connection due to magnetic attraction. A drive device (not shown) is connected to the second electrode 3f, and opens and closes the electrode by driving the second electrode 3f in the left-right direction on the paper in FIG. When the second electrode 3f contacts the first electrode 2e, an electric path is formed. At this time, the contact points are the tip of the first electrode 2e and the innermost part of the cavity of the second electrode 3f. Further, magnetic engagement is established by the attractive force of the magnets 5e and 5f, and contact between the electrodes is maintained even if the second electrode 3f is moved by a drive device (not shown).
In addition to the effects of Embodiments 1 and 2, since the outer diameter of the first electrode 2e can be made smaller, the mass can be reduced, and the spring 9 that locks the first electrode 2e can be reduced in size.
実施の形態4.
 図9は実施の形態4に係る開閉装置の開路状態を示す断面図である。電路を開くための基本性能は対向した第一の電極2gおよび第二の電極3hから構成される。第一の電極2gおよび第二の電極3hは、第一の端子1aおよび第二の端子1bに対して同軸上で動くよう図示しないガイド部品等で保持されている。また、第二の電極3hは図示しない駆動装置に接続されており、紙面左右方向に動作できるものとする。第二の電極3hは同軸上に設けられた筒状円柱であり、先端部が半球となる構造である。第一の電極2gも同軸上に設けられた筒状円柱であるが、凸形状となる第二の電極3hが篏合するように、先端部の中心部に凹形状となる半球形状のくぼみが存在する。第一の電極2gの外周部は電界が局所集中しないよう角を丸くしている。なお、第一の電極2gおよび第二の電極3hの構造は凹凸形状が逆になっていてもよい。第一の電極2gおよび第二の電極3hの外部には、それぞれ第一の端子1aおよび第二の端子1bが設置され、接触子6a、6bによって導通している。なお、第一の端子1aおよび第二の端子1bは、図示しない他機器と接続されており、第一の電極2gおよび第二の電極3hが接触した時に通電経路が形成され、電力を伝送する。さらに、電界緩和およびアーク10による損傷から電極を守る効果も備えている。
Embodiment 4.
FIG. 9 is a sectional view showing an open state of the switchgear according to the fourth embodiment. The basic performance for opening the electric path is composed of a first electrode 2g and a second electrode 3h that face each other. The first electrode 2g and the second electrode 3h are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b. Further, the second electrode 3h is connected to a drive device (not shown), and is capable of moving in the left-right direction in the drawing. The second electrode 3h is a cylindrical column provided on the same axis, and has a hemispherical tip. The first electrode 2g is also a cylindrical cylinder provided on the same axis, but there is a concave hemispherical depression in the center of the tip so that the convex second electrode 3h fits together. exist. The outer periphery of the first electrode 2g has rounded corners to prevent local concentration of the electric field. Note that the structures of the first electrode 2g and the second electrode 3h may have the concavo-convex shapes reversed. A first terminal 1a and a second terminal 1b are installed outside the first electrode 2g and second electrode 3h, respectively, and are electrically connected through contacts 6a and 6b. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2g and the second electrode 3h come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
 また、第一の電極2gおよび第二の電極3hの中心部の空洞にはそれぞれ磁石5a、5bが設置されている。ここで、磁石5a、5bの磁極方向は、第一の電極2gおよび第二の電極3hを接触させた時に、電極間に引力が働く方向の組み合わせとする。
 さらに、第一の端子1aには、固定ストッパー7aが取り付けられ、第一の電極2aには、移動ストッパー8aおよびバネ9が取り付けられている。固定ストッパー7aおよび移動ストッパー8aの間にバネ9が設置されており、第一の電極2aが紙面左右方向に動作するとともに、移動ストッパー8aも紙面左右方向に動作し、バネ9を伸縮する構造となっている。この時、固定ストッパー7aは動作せず、位置は変わらないものとする。このように第一の電極2aはバネ9によって第一の端子1aに繋止されている。
Further, magnets 5a and 5b are installed in the cavities at the center of the first electrode 2g and the second electrode 3h, respectively. Here, the magnetic pole directions of the magnets 5a and 5b are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2g and the second electrode 3h are brought into contact.
Further, a fixed stopper 7a is attached to the first terminal 1a, and a movable stopper 8a and a spring 9 are attached to the first electrode 2a. A spring 9 is installed between the fixed stopper 7a and the movable stopper 8a, and as the first electrode 2a moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, and the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7a does not operate and its position does not change. In this way, the first electrode 2a is fixed to the first terminal 1a by the spring 9.
 実施の形態4の動作については、基本的に実施の形態1と同様であるが、第一の電極2gおよび第二の電極3hの接触箇所と磁気による係合の動作について図10を用いて詳しく説明する。図10は実施の形態4に係る開閉装置の開路動作中を示すものであり、磁気の引力による係合、接続後に第二の電極を開路位置へ移動する途中の断面図である。図示しない駆動装置が第二の電極3hに接続されており、図10において紙面左右方向に第二の電極3hを駆動することで電極を開路および閉路する。第二の電極3hが第一の電極2gと接触すると電路が形成される。この時、第二の電極3hの半球凸面と、第一の電極2gの半球凹面とが接触点である。また、磁石5a、5bの引力によって磁気による係合が維持され、第二の電極3hが図示しない駆動装置によって移動しても電極間の接触が保持される。 The operation of the fourth embodiment is basically the same as that of the first embodiment, but the contact points of the first electrode 2g and the second electrode 3h and the operation of magnetic engagement will be described in detail with reference to FIG. explain. FIG. 10 shows the switchgear according to Embodiment 4 during a circuit-opening operation, and is a cross-sectional view showing the second electrode moving to the circuit-opening position after engagement and connection due to magnetic attraction. A drive device (not shown) is connected to the second electrode 3h, and opens and closes the electrode by driving the second electrode 3h in the left-right direction on the paper in FIG. 10. When the second electrode 3h contacts the first electrode 2g, an electric path is formed. At this time, the hemispherical convex surface of the second electrode 3h and the hemispherical concave surface of the first electrode 2g are the contact points. Moreover, the magnetic engagement is maintained by the attractive force of the magnets 5a and 5b, and even if the second electrode 3h is moved by a drive device (not shown), the contact between the electrodes is maintained.
 磁気による係合機構は、電極の接触面が正しく合わさっていれば、強い係合力を得ることができるが、電極が軸上からずれたり、傾いたりした場合に、磁石間の距離が大きく開いてしまい、引力(係合力)が低下することが考えられる。実施の形態4では、実施の形態1の効果に加えて、凹凸形状に形成された第一の電極2gの先端と第二の電極3hの先端とが半球形状で嵌合する構造となっているため、第一の電極2gまたは第二の電極3hが閉路時に軸上からずれたり、傾いたりしても、磁石5a、5b間の距離が大きくならず、安定して係合を保持することが可能である。 Magnetic engagement mechanisms can obtain strong engagement force if the contact surfaces of the electrodes are aligned correctly, but if the electrodes are off-axis or tilted, the distance between the magnets can become large. It is conceivable that this may cause the attractive force (engaging force) to decrease. In addition to the effects of the first embodiment, the fourth embodiment has a structure in which the tip of the first electrode 2g formed in an uneven shape and the tip of the second electrode 3h fit in a hemispherical shape. Therefore, even if the first electrode 2g or the second electrode 3h deviates from the axis or tilts when closing the circuit, the distance between the magnets 5a and 5b does not increase, and the engagement can be stably maintained. It is possible.
実施の形態5.
 図11は実施の形態5に係る開閉装置の開路状態を示す断面図である。電路を開くための基本性能は対向した第一の電極2aおよび第二の電極3bから構成される。第一の電極2aおよび第二の電極3bは、第一の端子1aおよび第二の端子1bに対して同軸上で動くよう図示しないガイド部品等で保持されている。また、第二の電極3bは図示しない駆動装置に接続されており、紙面左右方向に動作できるものとする。第一の電極2aおよび第二の電極3bは、同軸上に設けられた筒状円柱であり、外周部は、後方に引き下がるように角度がついている。第一の電極2aおよび第二の電極3bの外部には、それぞれ第一の端子1aおよび第二の端子1bが設置され、接触子6a、6bによって導通している。なお、第一の端子1aおよび第二の端子1bは、図示しない他機器と接続されており、第一の電極2aおよび第二の電極3bが接触した時に通電経路が形成され、電力を伝送する。さらに、電界緩和およびアーク10による損傷から電極を守る効果も備えている。
Embodiment 5.
FIG. 11 is a sectional view showing an open state of the switchgear according to the fifth embodiment. The basic performance for opening the electric path is composed of a first electrode 2a and a second electrode 3b facing each other. The first electrode 2a and the second electrode 3b are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b. Further, the second electrode 3b is connected to a drive device (not shown), and is capable of moving in the horizontal direction in the drawing. The first electrode 2a and the second electrode 3b are cylindrical columns provided coaxially, and the outer peripheral portions are angled so as to be drawn downward. A first terminal 1a and a second terminal 1b are installed outside the first electrode 2a and the second electrode 3b, respectively, and are electrically connected through contacts 6a and 6b. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2a and the second electrode 3b come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
 また、第一の電極2aおよび第二の電極3bの中心部の空洞にはそれぞれ磁石5a、5bが設置され、カバー4a、4bを取り付けることで保持されている。ここで、磁石5a、5bの磁極方向は、第一の電極2aおよび第二の電極3bを接触させた時に、電極間に引力が働く方向の組み合わせとする。カバー4a、4bの材質は、銅タングステン等の非磁性の金属材料、あるいはPTFE等の樹脂材料とする。
 さらに、第一の端子1aおよび第二の端子1bの内部には、それぞれ磁石11a、11bが設置されており、極間の放射状方向の磁界強度を強くする。ここで、磁石11a、11bは、磁性体との組み合わせでもよいものとする。
Further, magnets 5a and 5b are installed in the cavities at the center of the first electrode 2a and the second electrode 3b, respectively, and are held by attaching covers 4a and 4b. Here, the magnetic pole directions of the magnets 5a and 5b are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2a and the second electrode 3b are brought into contact with each other. The material of the covers 4a and 4b is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE.
Furthermore, magnets 11a and 11b are installed inside the first terminal 1a and the second terminal 1b, respectively, to strengthen the magnetic field strength in the radial direction between the poles. Here, the magnets 11a and 11b may be combined with a magnetic material.
 第一の端子1aには、固定ストッパー7aが取り付けられ、第一の電極2aには、移動ストッパー8aおよびバネ9が取り付けられている。固定ストッパー7aおよび移動ストッパー8aの間にバネ9が設置されており、第一の電極2aが紙面左右方向に動作するとともに、移動ストッパー8aも紙面左右方向に動作し、バネ9を伸縮する構造となっている。この時、固定ストッパー7aは動作せず、位置は変わらないものとする。このように第一の電極2aはバネ9によって第一の端子1aに繋止されている。図11には、実施の形態1と同様の構造を記載したが、実施の形態2から実施の形態4の構造において、第一の端子1aおよび第二の端子1bの内部に磁石11a、11bを設置しても構わない。 A fixed stopper 7a is attached to the first terminal 1a, and a movable stopper 8a and a spring 9 are attached to the first electrode 2a. A spring 9 is installed between the fixed stopper 7a and the movable stopper 8a, and as the first electrode 2a moves in the horizontal direction in the drawing, the movable stopper 8a also moves in the horizontal direction in the drawing, and the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7a does not operate and its position does not change. In this way, the first electrode 2a is fixed to the first terminal 1a by the spring 9. Although FIG. 11 shows a structure similar to that of Embodiment 1, in the structure of Embodiment 2 to 4, magnets 11a and 11b are provided inside the first terminal 1a and the second terminal 1b. You can set it up.
 実施の形態5の動作については、基本的に実施の形態1と同様であるが、磁気による係合の動作と、アークを消弧する際の動作について図12を用いて詳しく説明する。図12は、実施の形態5に係る開閉装置の開路時のアーク発生状態を示すものであり、磁気の引力による係合の解除後に電極間に発生したアークを遮断する途中の断面図である。
 図12の状態の前段階として、開路動作では第一の電極2aおよび第二の電極3bの中心部の空洞に設置された磁石5a、5bの引力によって磁気による係合が維持され、第二の電極3bが図示しない駆動装置によって移動しても電極間の接触が保持される。なお、磁石11a、11bは、引力を強める方向の磁界を発生するため、第一の電極2aおよび第二の電極3bの接触が保持された状態で、図示しない駆動装置によって第二の電極3bを紙面右方向に駆動すると、第二の電極3bとともに第一の電極2aが紙面右方向に移動する。
The operation of the fifth embodiment is basically the same as that of the first embodiment, but the magnetic engagement operation and the arc extinguishing operation will be described in detail with reference to FIG. 12. FIG. 12 shows the arc generation state when the switchgear according to the fifth embodiment opens the circuit, and is a sectional view in the middle of interrupting the arc generated between the electrodes after the engagement due to magnetic attraction is released.
As a preliminary step to the state shown in FIG. 12, in the opening operation, the magnetic engagement is maintained by the attractive force of the magnets 5a and 5b installed in the center cavities of the first electrode 2a and the second electrode 3b, and the second Even if the electrodes 3b are moved by a drive device (not shown), contact between the electrodes is maintained. In addition, since the magnets 11a and 11b generate a magnetic field in a direction that strengthens the attractive force, the second electrode 3b is moved by a drive device (not shown) while the first electrode 2a and the second electrode 3b are kept in contact with each other. When driven to the right in the paper, the first electrode 2a moves to the right in the paper together with the second electrode 3b.
 その後、バネ9の復元力と磁石5a、5bの引力とが釣り合い、磁気による係合が解除され、バネ9の復元力により、第一の電極2aおよび第二の電極3bが開離した後、通電中であれば第一の電極2aおよび第二の電極3bの間にアーク10が発生する。発生したアーク10は、磁石5a、5bおよび磁石11a、11bが作る磁界により、電極の円周方向に回転する。なお、電極表面の発弧点(アーク10の端部)は回転を続けると徐々に電極外周部へと移動していく。 Thereafter, the restoring force of the spring 9 and the attractive force of the magnets 5a, 5b are balanced, the magnetic engagement is released, and the first electrode 2a and the second electrode 3b are separated by the restoring force of the spring 9. If current is being applied, an arc 10 is generated between the first electrode 2a and the second electrode 3b. The generated arc 10 rotates in the circumferential direction of the electrode due to the magnetic fields created by the magnets 5a, 5b and the magnets 11a, 11b. Note that the firing point on the electrode surface (the end of the arc 10) gradually moves toward the outer periphery of the electrode as the rotation continues.
 本実施の形態5では実施の形態1の効果に加えて、磁石5a、5bが作る磁界と磁石11a、11bが作る磁界とにより、アーク10を電極の円周方向に回転させ、アーク10を冷却することで電流遮断性能を一層向上することができる。アーク発生時、電流は電極表面に対して垂直方向(軸方向)の成分が主となる。磁石5a、5bおよび磁石11a、11bが作る放射状方向の磁界と軸方向のアーク電流によって、円周方向のローレンツ力が働くため、アーク10は第一の電極2aおよび第二の電極3b上を回転する。特に、磁石11a、11bが挿入されることで、極間に生成される放射状方向の磁界が強くなるため、より遮断性能が向上する。また、磁石11a、11bは磁性体と組み合わせてもよい。
 特に、極間距離が大きくなるにつれて、アーク10の中央部付近は磁石5a、5bからの距離が遠いため、磁界強度が弱く、磁気による回転駆動の影響を受けにくい。そのため、磁石11a、11bを挿入することで磁界強度を強め、極間距離が大きくなっても、アーク10の端部だけでなく、中央部付近でも回転させることができるため、より電流遮断性能が向上する。
In the fifth embodiment, in addition to the effects of the first embodiment, the arc 10 is cooled by rotating the arc 10 in the circumferential direction of the electrode using the magnetic fields created by the magnets 5a and 5b and the magnetic fields created by the magnets 11a and 11b. By doing so, the current interrupting performance can be further improved. When an arc occurs, the main component of the current is perpendicular to the electrode surface (in the axial direction). The arc 10 rotates on the first electrode 2a and the second electrode 3b because the Lorentz force in the circumferential direction is exerted by the radial magnetic field and the axial arc current generated by the magnets 5a, 5b and the magnets 11a, 11b. do. In particular, by inserting the magnets 11a and 11b, the magnetic field in the radial direction generated between the poles becomes stronger, so that the blocking performance is further improved. Furthermore, the magnets 11a and 11b may be combined with a magnetic material.
In particular, as the distance between the poles increases, the distance near the center of the arc 10 from the magnets 5a, 5b becomes greater, so the magnetic field strength is weaker and less susceptible to the influence of rotational drive due to magnetism. Therefore, by inserting the magnets 11a and 11b, the magnetic field strength is strengthened, and even if the distance between the poles becomes large, the arc 10 can be rotated not only at the ends but also near the center, which improves current interrupting performance. improves.
実施の形態6.
 図13は実施の形態6に係る開閉装置の開路状態を示す断面図である。電路を開くための基本性能は対向した第一の電極2aおよび第二の電極3bから構成される。第一の電極2aおよび第二の電極3bは、第一の端子1aおよび第二の端子1bに対して同軸上で動くよう図示しないガイド部品等で保持されている。また、第二の電極3bは図示しない駆動装置に接続されており、紙面左右方向に動作できるものとする。第一の電極2aおよび第二の電極3bは、同軸上に設けられた筒状円柱であり、外周部は、後方に引き下がるように角度がついている。第一の電極2aおよび第二の電極3bの外部には、それぞれ第一の端子1aおよび第二の端子1bが設置され、接触子6a、6bによって導通している。なお、第一の端子1aおよび第二の端子1bは、図示しない他機器と接続されており、第一の電極2aおよび第二の電極3bが接触した時に通電経路が形成され、電力を伝送する。さらに、電界緩和およびアーク10による損傷から電極を守る効果も備えている。
Embodiment 6.
FIG. 13 is a sectional view showing an open state of the switchgear according to the sixth embodiment. The basic performance for opening the electric path is composed of a first electrode 2a and a second electrode 3b facing each other. The first electrode 2a and the second electrode 3b are held by a guide component (not shown) or the like so as to move coaxially with respect to the first terminal 1a and the second terminal 1b. Further, the second electrode 3b is connected to a drive device (not shown), and is capable of moving in the horizontal direction in the drawing. The first electrode 2a and the second electrode 3b are cylindrical columns provided coaxially, and the outer peripheral portions are angled so as to be drawn downward. A first terminal 1a and a second terminal 1b are installed outside the first electrode 2a and the second electrode 3b, respectively, and are electrically connected through contacts 6a and 6b. Note that the first terminal 1a and the second terminal 1b are connected to other equipment (not shown), and when the first electrode 2a and the second electrode 3b come into contact, a current-carrying path is formed and power is transmitted. . Furthermore, it has the effect of relaxing the electric field and protecting the electrode from damage caused by the arc 10.
 また、第一の電極2aおよび第二の電極3bの中心部の空洞にはそれぞれ磁石5a、5bが設置され、カバー4a、4bを取り付けることで保持されている。ここで、磁石5a、5bの磁極方向は、第一の電極2aおよび第二の電極3bを接触させた時に、電極間に引力が働く方向の組み合わせとする。カバー4a、4bの材質は、銅タングステン等の非磁性の金属材料、あるいはPTFE等の樹脂材料とする。
 さらに、第一の端子1aには、固定ストッパー7aおよび制限ストッパー12が取り付けられ、第一の電極2aには、移動ストッパー8cおよびバネ9が取り付けられている。固定ストッパー7aおよび移動ストッパー8cの間にバネ9が設置されており、第一の電極2aが紙面左右方向に動作するとともに、移動ストッパー8cも紙面左右方向に動作し、バネ9を伸縮する構造となっている。この時、固定ストッパー7aおよび制限ストッパー12は第一の端子1aに固定されており、位置は変わらないものとする。このように第一の電極2aはバネ9によって第一の端子1aに繋止されている。図13には、実施の形態1と同様の構造を記載したが、実施の形態2から実施の形態5の構造において、第一の端子1aに制限ストッパー12が設置されていても構わない。
Further, magnets 5a and 5b are installed in the cavities at the center of the first electrode 2a and the second electrode 3b, respectively, and are held by attaching covers 4a and 4b. Here, the magnetic pole directions of the magnets 5a and 5b are a combination of directions in which an attractive force acts between the electrodes when the first electrode 2a and the second electrode 3b are brought into contact with each other. The material of the covers 4a and 4b is a non-magnetic metal material such as copper tungsten, or a resin material such as PTFE.
Further, a fixed stopper 7a and a limiting stopper 12 are attached to the first terminal 1a, and a movable stopper 8c and a spring 9 are attached to the first electrode 2a. A spring 9 is installed between the fixed stopper 7a and the movable stopper 8c, and as the first electrode 2a moves in the horizontal direction in the drawing, the movable stopper 8c also moves in the horizontal direction in the drawing, so that the spring 9 is expanded and contracted. It has become. At this time, it is assumed that the fixed stopper 7a and the limit stopper 12 are fixed to the first terminal 1a and their positions do not change. In this way, the first electrode 2a is fixed to the first terminal 1a by the spring 9. Although the same structure as the first embodiment is shown in FIG. 13, in the structures of the second to fifth embodiments, a restriction stopper 12 may be installed at the first terminal 1a.
 実施の形態6の動作については、基本的に実施の形態1と同様であるが、第一の電極2aおよび第二の電極3bの磁気による係合の動作について図14を用いて詳しく説明する。図14は、実施の形態6に係る開閉装置の開路動作中を示すものであり、磁気の引力による係合、接続後に制限ストッパー12に当接した際の断面図である。第一の電極2aおよび第二の電極3bの中心部の空洞に設置された磁石5a、5bの引力によって磁気による係合が維持され、第二の電極3bが図示しない駆動装置によって移動しても電極間の接触が保持される。第一の電極2aに取り付けられた移動ストッパー8cおよび第一の端子1aに取り付けられた固定ストッパー7aの間にバネが挿入されており、第一の電極2aとともに移動ストッパー8cが紙面右方向に移動することで、バネ9が蓄勢していく。 The operation of the sixth embodiment is basically the same as that of the first embodiment, but the operation of magnetic engagement between the first electrode 2a and the second electrode 3b will be described in detail with reference to FIG. 14. FIG. 14 shows the opening/closing device according to the sixth embodiment during the circuit opening operation, and is a cross-sectional view when it comes into contact with the limit stopper 12 after engagement and connection due to magnetic attraction. The magnetic engagement is maintained by the attractive force of the magnets 5a and 5b installed in the center cavities of the first electrode 2a and the second electrode 3b, and even if the second electrode 3b is moved by a drive device (not shown). Contact between the electrodes is maintained. A spring is inserted between the movable stopper 8c attached to the first electrode 2a and the fixed stopper 7a attached to the first terminal 1a, and the movable stopper 8c moves to the right in the paper along with the first electrode 2a. By doing so, the spring 9 accumulates energy.
 やがて、移動ストッパー8cと停止部となる制限ストッパー12とが当接し、実施の形態1でバネ9の復元力と磁石5a、5bの引力とが釣り合う位置よりも紙面左方向の位置で、バネ9の蓄勢は強制的に制限される。この時、バネ9を蓄勢する変位量は一定であり、その復元力は磁石5a、5bの引力よりも小さい。第一の電極2aに設けられた移動ストッパー8cが第一の端子1aに設けられた停止部となる制限ストッパー12に当接することによって、第一の電極2aは移動を停止しようとする。一方、第二の電極3bは、図示しない駆動装置によって紙面右方向に移動を続けようとする。第一の電極2aおよび第二の電極3bの間にはバネ9による復元力に加えて、図示しない駆動装置によって斥力方向に力が働き、この力が磁石5a、5bの引力と釣り合った時に、磁気による係合が解除される。
 係合解除後は、バネ9の復元力により第一の電極2aは紙面左方向に移動を始める。また、第一の電極2aおよび第二の電極3bが開離した後、通電中であれば第一の電極2aおよび第二の電極3bの間にアーク10が発生する。
Eventually, the moving stopper 8c and the limiting stopper 12, which serves as a stop portion, come into contact with each other, and the spring 9 is moved at a position to the left in the drawing from the position where the restoring force of the spring 9 and the attractive forces of the magnets 5a and 5b are balanced in the first embodiment. reserves are forcibly limited. At this time, the amount of displacement that forces the spring 9 is constant, and its restoring force is smaller than the attractive force of the magnets 5a and 5b. When the movement stopper 8c provided on the first electrode 2a comes into contact with the limiting stopper 12 provided on the first terminal 1a, which serves as a stop portion, the first electrode 2a tries to stop moving. On the other hand, the second electrode 3b tries to continue moving rightward in the drawing by a drive device (not shown). In addition to the restoring force of the spring 9, a repulsive force acts between the first electrode 2a and the second electrode 3b by a drive device (not shown), and when this force balances the attractive force of the magnets 5a and 5b, The magnetic engagement is released.
After the engagement is released, the first electrode 2a begins to move to the left in the drawing due to the restoring force of the spring 9. Further, after the first electrode 2a and the second electrode 3b are separated, an arc 10 is generated between the first electrode 2a and the second electrode 3b if current is being applied.
 実施の形態1の効果に加えて、次の効果がある。実施の形態1では、バネの復元力と磁石5a、5bの引力とが釣り合った時に磁気による係合が解除される構造であった。一方、実施の形態6では、移動ストッパー8cが停止部となる制限ストッパー12に当接することによって、バネ9による復元力に加えて、図示しない駆動装置によって斥力方向に力が働き、この力が磁石5a、5bの引力と釣り合った時に、磁気による係合が解除される構造である。したがって、制限ストッパー12を設けることにより、バネを蓄勢する変化量を小さくでき、バネ9の劣化を低減し、寿命を延ばすことができる。また、多数回動作およびバネ9の劣化等により、復元力の変化が多少生じた場合においても、開路速度のバラつきを抑えることが可能である。さらに、磁石5a、5bおよびバネ9の個体差によるもの、また第一の電極2aまたは第二の電極3bが閉路時に軸上からずれたり、傾いたりすることによるものなど、第一の電極2aおよび第二の電極3bの係合を解除する位置のバラつきを抑えることが可能である。 In addition to the effects of Embodiment 1, there are the following effects. In the first embodiment, the magnetic engagement is released when the restoring force of the spring and the attractive force of the magnets 5a and 5b are balanced. On the other hand, in the sixth embodiment, when the moving stopper 8c comes into contact with the limiting stopper 12 serving as a stop portion, in addition to the restoring force by the spring 9, a force is exerted in the repulsive direction by a drive device (not shown), and this force is applied to the magnet. It has a structure in which the magnetic engagement is released when the attractive forces of 5a and 5b are balanced. Therefore, by providing the limiting stopper 12, the amount of change in energy storage of the spring can be reduced, deterioration of the spring 9 can be reduced, and the life of the spring can be extended. Moreover, even if the restoring force changes somewhat due to multiple operations and deterioration of the spring 9, it is possible to suppress variations in the opening speed. Furthermore, the first electrode 2a and the second electrode 3b may be caused by individual differences between the magnets 5a, 5b and the spring 9, or by the first electrode 2a or the second electrode 3b being off-axis or tilted when the circuit is closed. It is possible to suppress variations in the position at which the engagement of the second electrode 3b is released.
 本願は、様々な例示的な実施の形態および実施例が記載されているが、1つ、または複数の実施の形態に記載された様々な特徴、態様、および機能は特定の実施の形態の適用に限られるのではなく、単独で、または様々な組み合わせで実施の形態に適用可能である。従って、例示されていない無数の変形例が、本願明細書に開示される技術の範囲内において想定される。例えば、少なくとも1つの構成要素を変形する場合、追加する場合または省略する場合、さらには、少なくとも1つの構成要素を抽出し、他の実施の形態の構成要素と組み合わせる場合が含まれるものとする。 Although this application describes various exemplary embodiments and examples, the various features, aspects, and functions described in one or more embodiments may be applicable to a particular embodiment. The present invention is not limited to, and can be applied to the embodiments alone or in various combinations. Accordingly, countless variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, this includes cases where at least one component is modified, added, or omitted, and cases where at least one component is extracted and combined with components of other embodiments.
1a 第一の端子、1b 第二の端子、2a,2c,2e,2g 第一の電極、3b,3d,3f,3h 第二の電極、4a,4b,4c,4d,4e,4f カバー、5a,5b,5c,5d,5e,5f 磁石、6a,6b,6c,6d,6e,6f 接触子、7a,7c,7e 固定ストッパー、8a,8c 移動ストッパー、9 バネ、10 アーク、11a,11b 磁石、12 制限ストッパー。 1a First terminal, 1b Second terminal, 2a, 2c, 2e, 2g First electrode, 3b, 3d, 3f, 3h Second electrode, 4a, 4b, 4c, 4d, 4e, 4f Cover, 5a , 5b, 5c, 5d, 5e, 5f magnet, 6a, 6b, 6c, 6d, 6e, 6f contact, 7a, 7c, 7e fixed stopper, 8a, 8c moving stopper, 9 spring, 10 arc, 11a, 11b magnet , 12 limit stopper.

Claims (14)

  1.  対向配置された第一の端子と第二の端子の間を開閉する開閉装置であって、
    前記第一の端子に設けられた第一の電極と、
    前記第二の端子に設けられ、前記第一の電極と接離可能に駆動される第二の電極と、
    を備え、
    前記第一の電極と前記第二の電極とは、各電極の内部に配置された磁石の引力により接触し、導通が保持されていることを特徴とする開閉装置。
    A switching device that opens and closes between a first terminal and a second terminal that are arranged opposite to each other,
    a first electrode provided on the first terminal;
    a second electrode provided on the second terminal and driven to be able to come into contact with and separate from the first electrode;
    Equipped with
    The switchgear is characterized in that the first electrode and the second electrode are brought into contact with each other by the attractive force of a magnet placed inside each electrode, and conduction is maintained.
  2.  前記第一の端子と前記第二の端子の間の閉路は、前記第一の電極と前記第二の電極との接触によって行われ、
    前記第一の端子と前記第二の端子の間の開路は、前記第一の電極と前記第二の電極との開離によって行われることを特徴とする請求項1に記載の開閉装置。
    Closing between the first terminal and the second terminal is performed by contact between the first electrode and the second electrode,
    The switchgear according to claim 1, wherein the opening between the first terminal and the second terminal is performed by separating the first electrode and the second electrode.
  3.  前記第一の電極は、バネによって前記第一の端子に繋止されていることを特徴とする請求項2に記載の開閉装置。 The switchgear according to claim 2, wherein the first electrode is connected to the first terminal by a spring.
  4.  前記開路は、前記導通を保持したまま開路方向に駆動される前記第二の電極と前記第一の電極との間の前記磁石の引力と、前記第一の電極を繋止する前記バネの復元力と、を利用することを特徴とする請求項3に記載の開閉装置。 The opening is caused by the attractive force of the magnet between the second electrode and the first electrode, which are driven in the opening direction while maintaining the conduction, and the restoration of the spring that locks the first electrode. The opening/closing device according to claim 3, wherein the opening/closing device utilizes a force.
  5.  前記開路は、前記駆動により前記バネの復元力が前記磁石の引力よりも大きくなったことで行われることを特徴とする請求項4記載の開閉装置。 The opening/closing device according to claim 4, wherein the circuit is opened when the restoring force of the spring becomes larger than the attractive force of the magnet due to the driving.
  6.  前記開路は、前記駆動により前記第一の端子と前記第一の電極の間に設けられた停止部に前記第一の電極が当接したことで行われることを特徴とする請求項4記載の開閉装置。 5. The circuit opening according to claim 4, wherein the opening is performed when the first electrode comes into contact with a stop portion provided between the first terminal and the first electrode due to the driving. Switchgear.
  7.  前記磁石は前記第一の電極と前記第二の電極との間に発生するアークが回転するように磁極が配置されていることを特徴とする請求項1から請求項6のいずれか1項に記載の開閉装置。 7. The magnet has magnetic poles arranged so that an arc generated between the first electrode and the second electrode rotates. Switchgear as described.
  8.  前記第一の電極と前記第二の電極の先端部は、各電極の外側に向かってに離間するように形成されていることを特徴とする請求項1から請求項7のいずれか1項に記載の開閉装置。 According to any one of claims 1 to 7, the tip portions of the first electrode and the second electrode are formed so as to be spaced apart toward the outside of each electrode. Switchgear as described.
  9.  前記第一の電極と前記第二の電極の先端部は、互いに嵌合する凹凸形状に形成されていることを特徴とする請求項1から請求項8のいずれか1項に記載の開閉装置。 The opening/closing device according to any one of claims 1 to 8, wherein the first electrode and the second electrode have distal ends formed in a concave and convex shape that fit into each other.
  10.  前記凹凸形状の内、凹形状を有する一方の電極は、内径が底部に向かって小さくなる形状に形成され、凸形状を有する他方の電極と前記底部で接触することにより導通することを特徴とする請求項9に記載の開閉装置。 Among the uneven shapes, one electrode having a concave shape is formed in a shape whose inner diameter becomes smaller toward the bottom, and conduction is established by contacting the other electrode having a convex shape at the bottom. The opening/closing device according to claim 9.
  11.  前記第一の端子と前記第二の端子の少なくとも一方に、磁石が配置されていることを特徴とする請求項1から請求項10のいずれか1項に記載の開閉装置。 The switchgear according to any one of claims 1 to 10, wherein a magnet is disposed on at least one of the first terminal and the second terminal.
  12.  前記磁石の少なくとも1つは、磁性体と組み合わせて配置されていることを特徴とする請求項1から請求項11のいずれか1項に記載の開閉装置。 The switchgear according to any one of claims 1 to 11, wherein at least one of the magnets is arranged in combination with a magnetic body.
  13.  前記磁石が対向する面にはカバーが設けられ、前記カバーの材質が非磁性の金属材料、あるいは樹脂材料であることを特徴とする請求項1から請求項12のいずれか1項に記載の開閉装置。 The opening/closing device according to any one of claims 1 to 12, wherein a cover is provided on the surface facing the magnet, and the material of the cover is a non-magnetic metal material or a resin material. Device.
  14.  前記カバーの材質が前記樹脂材料であり、前記第一の電極と前記第二の電極との間に発生するアークにより、アブレーションガスを発生させることを特徴とする請求項13に記載の開閉装置。 The switchgear according to claim 13, wherein the material of the cover is the resin material, and an ablation gas is generated by an arc generated between the first electrode and the second electrode.
PCT/JP2022/016571 2022-03-31 2022-03-31 Opening and closing device WO2023188287A1 (en)

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JP2022546615A JP7162782B1 (en) 2022-03-31 2022-03-31 switchgear
PCT/JP2022/016571 WO2023188287A1 (en) 2022-03-31 2022-03-31 Opening and closing device

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PCT/JP2022/016571 WO2023188287A1 (en) 2022-03-31 2022-03-31 Opening and closing device

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197144U (en) * 1981-06-11 1982-12-14
WO1994014177A1 (en) * 1992-12-16 1994-06-23 Nu-Lec Pty. Ltd. Arc extinguishing switch apparatus and method
JP2003346611A (en) * 2002-05-23 2003-12-05 Mitsubishi Electric Corp Gas-insulating switch
JP2010251056A (en) * 2009-04-14 2010-11-04 Mitsubishi Electric Corp Switch
WO2014174917A1 (en) * 2013-04-22 2014-10-30 株式会社日立製作所 Switching device
JP2020042985A (en) * 2018-09-11 2020-03-19 日新電機株式会社 Gas circuit breaker
JP2020161459A (en) * 2019-03-28 2020-10-01 株式会社日立製作所 Ground switchgear and gas insulation switchgear with the same
WO2021152646A1 (en) * 2020-01-27 2021-08-05 三菱電機株式会社 Gas-insulated switchgear

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197144U (en) * 1981-06-11 1982-12-14
WO1994014177A1 (en) * 1992-12-16 1994-06-23 Nu-Lec Pty. Ltd. Arc extinguishing switch apparatus and method
JP2003346611A (en) * 2002-05-23 2003-12-05 Mitsubishi Electric Corp Gas-insulating switch
JP2010251056A (en) * 2009-04-14 2010-11-04 Mitsubishi Electric Corp Switch
WO2014174917A1 (en) * 2013-04-22 2014-10-30 株式会社日立製作所 Switching device
JP2020042985A (en) * 2018-09-11 2020-03-19 日新電機株式会社 Gas circuit breaker
JP2020161459A (en) * 2019-03-28 2020-10-01 株式会社日立製作所 Ground switchgear and gas insulation switchgear with the same
WO2021152646A1 (en) * 2020-01-27 2021-08-05 三菱電機株式会社 Gas-insulated switchgear

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JPWO2023188287A1 (en) 2023-10-05

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