WO2023188287A1 - 開閉装置 - Google Patents

開閉装置 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
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2022/016571
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
淳一 安部
耕一 香川
貴広 江戸
泰規 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2022/016571 priority Critical patent/WO2023188287A1/ja
Priority to CN202280093713.XA priority patent/CN118872019A/zh
Priority to EP22935430.3A priority patent/EP4503078A4/en
Priority to JP2022546615A priority patent/JP7162782B1/ja
Publication of WO2023188287A1 publication Critical patent/WO2023188287A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
    • H01H31/26—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
    • H01H31/32—Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H33/182—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
    • H01H2001/545—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force having permanent magnets directly associated with the contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
    • H01H33/18—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H33/185—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using magnetisable elements associated with the contacts

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)
PCT/JP2022/016571 2022-03-31 2022-03-31 開閉装置 Ceased WO2023188287A1 (ja)

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PCT/JP2022/016571 WO2023188287A1 (ja) 2022-03-31 2022-03-31 開閉装置
CN202280093713.XA CN118872019A (zh) 2022-03-31 2022-03-31 开关装置
EP22935430.3A EP4503078A4 (en) 2022-03-31 2022-03-31 OPENING AND CLOSING DEVICE
JP2022546615A JP7162782B1 (ja) 2022-03-31 2022-03-31 開閉装置

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Citations (9)

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JPS57197144U (https=) * 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 (ja) * 2002-05-23 2003-12-05 Mitsubishi Electric Corp ガス絶縁開閉器
JP2010027479A (ja) 2008-07-23 2010-02-04 Mitsubishi Electric Corp 開閉器
JP2010251056A (ja) * 2009-04-14 2010-11-04 Mitsubishi Electric Corp 開閉器
WO2014174917A1 (ja) * 2013-04-22 2014-10-30 株式会社日立製作所 開閉装置
JP2020042985A (ja) * 2018-09-11 2020-03-19 日新電機株式会社 ガス遮断器
JP2020161459A (ja) * 2019-03-28 2020-10-01 株式会社日立製作所 接地開閉装置及びそれを備えたガス絶縁開閉装置
WO2021152646A1 (ja) * 2020-01-27 2021-08-05 三菱電機株式会社 ガス絶縁開閉装置

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Publication number Priority date Publication date Assignee Title
JP2004236459A (ja) * 2003-01-31 2004-08-19 Hitachi Ltd ガス絶縁開閉装置

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Publication number Priority date Publication date Assignee Title
JPS57197144U (https=) * 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 (ja) * 2002-05-23 2003-12-05 Mitsubishi Electric Corp ガス絶縁開閉器
JP2010027479A (ja) 2008-07-23 2010-02-04 Mitsubishi Electric Corp 開閉器
JP2010251056A (ja) * 2009-04-14 2010-11-04 Mitsubishi Electric Corp 開閉器
WO2014174917A1 (ja) * 2013-04-22 2014-10-30 株式会社日立製作所 開閉装置
JP2020042985A (ja) * 2018-09-11 2020-03-19 日新電機株式会社 ガス遮断器
JP2020161459A (ja) * 2019-03-28 2020-10-01 株式会社日立製作所 接地開閉装置及びそれを備えたガス絶縁開閉装置
WO2021152646A1 (ja) * 2020-01-27 2021-08-05 三菱電機株式会社 ガス絶縁開閉装置

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Title
See also references of EP4503078A4

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EP4503078A1 (en) 2025-02-05
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CN118872019A (zh) 2024-10-29
JP7162782B1 (ja) 2022-10-28

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