JP2006147212A - Changeover switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a changeover switching device capable of surely switching and obtaining a state that two pairs of switching contacts are opened, and capable of accelerating switching speed. <P>SOLUTION: Vacuum switches 2, 4 and a drive shaft 51 of a driving device 5 are linearly arrayed, the drive shaft 51 is linearly driven to right and left by a driving coil device 60, and a state that either the vacuum switch 2 or the vacuum switch 4 is opened and the other is closed by a movable yoke 86 abutting on the left or a right inner wall of a fixed yoke 81, and a state that both the vacuum switches 2, 4 are opened even if the movable yoke 86 does not abut on either of the left and right inner walls of the fixed yoke 81 are obtained. Further, since one driving device 5 drives so that the vacuum switches 2, 4 are inverted to each other in switching states, there is no fear that both the vacuum switches 2, 4 are closed at the same time, thus enabling sure changeover. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a switching opening and closing device that switches, for example, a plurality of power supplies and loads.

  Conventional switchgear switches include one that uses two switches to reverse the opening and closing, and one drive that reverses the opening and closing of two sets of switching contacts. A disc spring is provided on the movable part side including the movable contact in order to ensure the contact pressure of the switching contact even when the switching contact is worn (see, for example, Patent Document 1).

JP 2000-113781 A (paragraph numbers 0018, 0019 and FIG. 1)

In such a switching switch using two switches, the drive control of each switch becomes complicated, and there is a possibility that the two switches are closed simultaneously. Further, in the case where the opening / closing reverse operation is performed with one driving device, there is a problem that an intermediate state in which the two sets of opening / closing contacts are both opened cannot be created. Further, since the spring is provided on the movable part side, there is a problem that the mass of the movable part increases, the operation speed is limited, and the opening / closing operation cannot be performed at high speed.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a switching switch that can be switched reliably and can realize a state in which two sets of switching contacts are both open. And It is another object of the present invention to provide a switching opening / closing device that can increase the opening / closing speed.

The switching opening and closing device according to the present invention is
Having first and second switches and a driving device,
The first switch has first and second contacts disposed opposite to each other,
The second switch has third and fourth contacts arranged opposite to each other,
The drive device includes a drive shaft, a three-position stop device, and an electromagnetic drive device. The drive shaft, the three-position stop device, and the electromagnetic drive device are connected, and the drive shaft is driven by the electromagnetic drive device and linearly moves in a predetermined direction. With the three-position stop device, the first and second positions and the third position between the first and second positions can be stably stopped,
Driving the first and third contacts in a predetermined direction by the drive shaft closes the first switch at the first position and opens the second switch to drive in the direction opposite to the predetermined direction. Thus, the first switch is opened at the second position, the second switch is closed, and the first and second switches are both opened at the third position.

In the switching opening and closing device according to the present invention,
Having first and second switches and a driving device,
The first switch has first and second contacts disposed opposite to each other,
The second switch has third and fourth contacts arranged opposite to each other,
The drive device includes a drive shaft, a three-position stop device, and an electromagnetic drive device. The drive shaft, the three-position stop device, and the electromagnetic drive device are connected, and the drive shaft is driven by the electromagnetic drive device and linearly moves in a predetermined direction. With the three-position stop device, the first and second positions and the third position between the first and second positions can be stably stopped,
Driving the first and third contacts in a predetermined direction by the drive shaft closes the first switch at the first position and opens the second switch to drive in the direction opposite to the predetermined direction. Since the first switch is opened at the second position and the second switch is closed, and the first and second switches are both opened at the third position.
There is no fear that the first and second switches are closed at the same time, switching can be performed reliably, and a state where both the first and second switching contacts are open can be realized.

Embodiment 1 FIG.
1 to 4 show a first embodiment for carrying out the present invention. FIG. 1 is a sectional view showing a configuration of a switching switchgear, and FIGS. 2 to 4 are explanations for explaining an operation. FIG. In FIG. 1, the switching opening / closing device includes a first vacuum switch 2, a second vacuum switch 4, a driving device 5, a first terminal plate 11, a first sliding current collector 12, and a first disc spring 13. The second terminal plate 16, the second sliding current collector 17, and the second disc spring 18. The first vacuum switch 2 that is the first switch is provided with a fixed electrode 23 that hermetically penetrates a metal disk 22 that is hermetically fixed to the left end of the ceramic cylinder 21 in FIG. A fixed contact 24 is fixed to the right end of the fixed electrode 23. A movable electrode 27 is provided through a bellows (not shown) provided on a side plate 26 that is airtightly fixed to the right end of the ceramic cylinder 21. A movable contact 28 is fixed to the left end of the movable electrode 27. The fixed electrode 23, the fixed contact 24, the movable electrode 27, and the movable contact 28 are on the central axis A of the ceramic cylinder 21, and the fixed contact 24 and the movable contact 28 are arranged to face each other. A connection plate 29 is fixed to the movable electrode 27.

  The first vacuum switch 2 is configured as described above, and the fixed contact 24 and the movable contact 28 are accommodated in a vacuum container 20 in which the fixed contact 24 is formed by the ceramic cylinder 21, the metal disc 22, and the side plate 26. Yes. The fixed contact 24 is electrically connected to the first terminal plate 11 fixed to a support frame (not shown) via the fixed electrode 23 and the first sliding current collector 12. The first disc spring 13 is inserted into the fixed electrode 23 and interposed between the metal disk 22 and the first terminal plate 11, and the fixed electrode 23, that is, the first vacuum switch 2 is inserted. When receiving a predetermined force in the direction of the central axis A from the right side of FIG. 1, the first disc spring 13 is elastically deformed, and the first vacuum switch 2 is moved to the left by a predetermined distance (for example, 1 to 2 mm). It can be moved. The first disc spring 13 functions as a wiping means for ensuring the contact pressure between the fixed contact 24 and the movable contact 28 when they are consumed.

  The second vacuum switch 4, which is the second switch, has a fixed electrode 43 that penetrates a metal disk 42 that is airtightly fixed to the right end of the ceramic cylinder 41. A fixed contact 44 is fixed to the other end. A movable electrode 47 is provided through the side plate 46 fixed to the left end of the ceramic cylinder 41. A movable contact 48 is fixed to the right end of the movable electrode 47. The fixed electrode 43, the fixed contact 44, the movable electrode 47, and the movable contact 48 are on the central axis B of the ceramic cylinder 41, and the fixed contact 44 and the movable contact 48 are arranged to face each other. A connection plate 49 is fixed to the movable electrode 47. The second vacuum switch 4 is configured as described above, and the fixed contact 44 and the movable contact 48 are accommodated in a vacuum container 40 in which the fixed contact 44 is formed by the ceramic cylinder 41, the metal disc 42, and the side plate 46. Yes.

  The fixed contact 44 is electrically connected to the second terminal plate 16 fixed to a support frame (not shown) via the fixed electrode 43 and the second sliding current collector 17. The second disc spring 18 is inserted through the fixed electrode 43 and interposed between the metal disk 42 and the second terminal plate 16, and the fixed electrode 43, that is, the second vacuum switch 4 is inserted. When a predetermined force in the direction of the central axis B is received from the left in FIG. 1, the second disc spring 18 is elastically deformed, and the second vacuum switch 4 is moved to the right by a predetermined distance (for example, 1 to 2 mm). It can be moved. The second disc spring 18 functions as a wiping means for securing the contact pressure between the fixed contact 44 and the movable contact 48 even when the fixed contact 44 and the movable contact 48 are consumed. In this embodiment, the first vacuum switch 2 and the second vacuum switch 4 are substantially on a straight line, that is, the central axis A and the central axis B are on the same axis D (details will be described later). It is arrange | positioned so that it may exist.

  The drive device 5 includes a drive shaft 51, an insulating member 53, an insulating member 54, a drive coil device 60 as an electromagnetic drive device, and a magnet device 80 as a three-position stop device. In this embodiment, the drive shaft 51, the first vacuum switch 2, and the second vacuum switch 4 are substantially on a straight line, that is, the central axis C, the central axis A, and the central axis B of the drive shaft 51. Are arranged on the same axis D. The drive shaft 51 is connected to the movable electrode 27 of the first vacuum switch 2 and the movable electrode 47 of the second vacuum switch 4 via an insulating member 53 and an insulating member 54 provided at the left and right ends in FIG. ing. The drive coil device 60 includes a first repulsion copper plate 61 as an eddy current repulsion body and a main repulsion conductor, a second repulsion copper plate 62 and a third repulsion copper plate 63 as an eddy current repulsion body and a secondary repulsion conductor, and an electromagnetic coil device. As a first repulsion coil 67 and a second repulsion coil 68.

  The first repulsion copper plate 61, the second repulsion copper plate 62, and the third repulsion copper plate 63 have a disc shape, and the diameters of the second repulsion copper plate 62 and the third repulsion copper plate 63 are the same. The diameter of the first repulsion copper plate 61 is larger than the diameters of the second repulsion copper plate 62 and the third repulsion copper plate 63 by a predetermined distance in the direction of the axis D as shown in FIG. 51 is fixed. The first repulsion coil 67 and the second repulsion coil 68 have a hollow annular shape with a rectangular cross section, have substantially the same outer diameter as the first repulsion copper plate 61, and the inner diameter of the hollow portion is the second rebound coil. The outer diameter of the repulsion copper plate 62 and the third repulsion copper plate 63 is slightly larger, and the second repulsion copper plate 62 and the third repulsion copper plate 63 can pass through the hollow portion. The first repulsion coil 67 and the second repulsion coil 68 are fixed to a support frame (not shown) so as to have a predetermined distance in the direction of the axis D so that the first repulsion copper plate 61 is in between. .

  The magnet device 80 includes a fixed yoke 81, a permanent magnet 82, a permanent magnet 83, a permanent magnet 84, a permanent magnet 85, and a movable yoke 87. The fixed yoke 81 fixed to a support frame (not shown) is a hollow rectangular parallelepiped in which two surfaces in a direction perpendicular to the paper surface in FIG. 1 are opened, and is formed by laminating electromagnetic steel plates, and is formed on both left and right sides in the D-axis direction. The drive shaft 51 passes through the surface portion with a slight gap. The fixed yoke 81 is actually divided into two in the direction of the axis D, and two U-shaped members as viewed from the direction perpendicular to the paper surface in FIG. Has been. The permanent magnet 82 or the permanent magnet 85 is a rod-shaped rod having a rectangular cross section formed of ferrite, and the permanent magnet 82 and the permanent magnet 84 and the permanent magnet 83 and the permanent magnet 85 are spaced apart in the direction of the axis D by a predetermined distance. In close contact with the fixed yoke 81, it is fixed to four locations on the inner peripheral portion of the fixed yoke 81 as shown in FIG.

  The movable yoke 87 has a first projecting portion 87a and a second projecting projecting vertically at a predetermined interval in the axis D direction (the same interval as the interval between the permanent magnet 82 and the permanent magnet 84). It has a rectangular block shape provided with a portion 87b, and is manufactured by laminating electromagnetic steel sheets. The movable yoke 87 is mounted and fixed to the drive shaft 51 with an interference fit. Note that the air gap between the movable yoke 87 (the first projecting portion 87a and the second projecting portion 87b) and the permanent magnet 82 or the permanent magnet 85 in the vertical direction in FIG. 88 is made smaller than the air gap 86 provided in the direction of the axis D.

  The switching opening / closing device is configured as described above, and the first terminal plate 11 and the second terminal plate 16 are connected to first and second power sources (not shown), respectively, and the connection plate 29 and the connection plate 49 are shared. Connected and connected to load. With the switching opening and closing device configured in this way, it is possible to switch the load so that power is supplied from the first power supply or the second power supply, and no power is supplied from either power supply. it can. The operation will be described below.

  FIG. 1 shows a state in which the first vacuum switch 2 is open and the second vacuum switch 4 is closed, and a second power source includes a second terminal plate 16, a fixed electrode 43, a movable electrode 47, and a connection plate 49. The load is connected via The connection plate 29 is disconnected from the first power source. At this time, the right side surface of the first repulsive copper plate 61 is close to the second repulsive coil 68, and the permanent magnets 84 and 85 are air gaps in a direction orthogonal to the first projecting portion 87 a of the movable yoke 87 and the axis D. 88 is provided at the opposite position. Then, the magnetic flux by the permanent magnet 84 passes through the fixed yoke 81 and the movable yoke 87 as shown by the magnetic flux Φ1 in FIG. 2, and the magnetic force by the magnetic flux Φ1 and the magnetic force by the magnetic flux similar to the magnetic flux Φ1 by the permanent magnet 85 are obtained. The movable yoke 87 presses the movable contact 48 in FIGS. 2 and 1 to the right with respect to the fixed contact 44 with the pressing force Flight via the drive shaft 51 and the movable electrode 47. Then, the second disc spring 18 is compressed by 1 mm by receiving the pressing force Fright through the drive shaft 51, the movable electrode 47, the movable contact 48, the fixed contact 44, the fixed electrode 43, and the metal disc 42. A predetermined contact pressure is applied between the fixed contact 44 and the movable contact 48 in a state in which the vacuum switch 4 is moved to the right by 1 mm. Here, the second disc spring 16 functions as a wiping means for securing the contact pressure between the contacts when the third and fourth contacts are worn. Accordingly, the mass of the moving part including the drive shaft 51 and the movable yoke 87 is reduced, so that the opening speed can be increased.

  From the state shown in FIG. 2, a high-frequency current is passed through the second repulsive coil 68 to generate a magnetic flux Φa, and thereby an eddy current is induced in the first repulsive copper plate 61 to exert a repulsive force, and the repulsive force Frepa is pushed. When the pressure Flight is exceeded, the entire movable part including the first repulsive copper plate 61 and the drive shaft 51 and the movable yoke 87 fixed to the first repulsive copper plate 61 is driven leftward. When the movable yoke 87 moves a predetermined distance in the left direction, an air gap in the direction of the axis D is formed between the movable yoke 87 and the fixed yoke 81, so that the pressing force Flight is rapidly attenuated and further moved to the left. When the movable yoke 87 reaches the vicinity of the center of the fixed yoke 81, as shown by arrows in FIG. 3, the first protruding portion 87a, the second protruding portion 87b, and the fixed yoke 81 formed by the permanent magnet 82 and the permanent magnet 84 are used. , And the magnetic flux Φ2 passing through the air gap 86 and the holding force Fhold by the magnetic flux similar to the magnetic flux Φ2 created by the permanent magnet 83 and the permanent magnet 85, the motor stops at the center position.

  In this state, both the first vacuum switch 2 and the second vacuum switch 4 are opened, and the load is disconnected from both the first and second power sources. When the second vacuum switch 4 is opened, the movable electrode 27 is rapidly driven in the left direction, but the second vacuum switch 4 applied with a force in the left direction by the second disc spring 18 Since it has its own mass, it starts to move to the left with a slight delay from the movable electrode 47, so that the opening time is not delayed due to the wipe of the movable contact 48. Therefore, the movable contact 48 is instantaneously separated from the fixed contact 44 and an arc is generated.

  Here, when the high-speed switching from the state of FIG. 1 in which the load is connected to the second power supply without stopping the movable yoke 87 at the intermediate position to the state of connection to the first power supply, the second repulsion coil When the high-frequency current flowing through 68 is increased (see FIGS. 1 and 2) and the kinetic energy applied to the drive shaft 51 is increased to be larger than the integral value of the holding force Fhold by the permanent magnet 82 or the permanent magnet 85 at the intermediate position, the intermediate position Then, the load can be switched to a position where the load is connected to the first power source without stopping. In this way, by controlling the magnitude of the high-frequency current flowing through the second repulsion coil 68, it is possible to control switching between all power source disconnection and connection to the first power source.

  Here, FIG. 3 shows the state of the magnetic flux Φ2 by the permanent magnet 82 and the permanent magnet 83 when the drive shaft 51 is temporarily stopped in the intermediate position. Although the magnetic flux by the permanent magnet 84 and the permanent magnet 85 is not shown, it is the same as the magnetic flux Φ2 indicated by the arrow. By causing a high frequency to flow through the second repulsion coil 68 and generating a magnetic flux Φs, an eddy current is induced in the nearby third repulsion copper plate 63 to generate a repulsive force. When the repulsive force Frepc between the second repulsive coil 68 and the third repulsive copper plate 63 exceeds the holding force Fhold by the permanent magnet 82 or the permanent magnet 85, the movable part including the drive shaft 51 and the movable yoke 87 is moved. While being driven in the left direction in FIGS. 1 and 3, the holding force Fhold is suddenly weakened and further accelerated in the left direction. When the movable yoke 87 is driven leftward and the movable contact 28 of the first vacuum switch 2 comes into contact with the fixed contact 24, the kinetic energy of the movable portion such as the drive shaft 51 and the movable yoke 87 up to that point and the permanent magnet of the magnet device 80 are obtained. 82, the first disc spring 13 is compressed through the fixed contact 24, the fixed electrode 23, and the metal disk 22 by the magnetic force of the permanent magnet 83, and the movable shaft 51, the movable yoke 87, and the like including the first vacuum switch 2 are compressed. The movable portion further moves leftward, and the movable yoke 87 comes into contact with the left side surface of the fixed yoke 81 facing the movable yoke 87 and stops. As a result, the first vacuum switch 2 is closed, the second vacuum switch 4 is opened, and the load is connected to the first power source.

  In this state, as shown in FIG. 4, the left side surface of the first repulsive copper plate 61 is close to the first repulsive coil 67, and the permanent magnet 82 is provided with the first projecting portion 87 a and the radial air gap 88. The magnetic flux Φ3 generated by the permanent magnet 82 passes through the fixed yoke 81 and the movable yoke 87 as shown by the arrows in FIG. 4, and the movable yoke 87 is driven by the magnetic flux Φ3 and the similar magnetic flux generated by the permanent magnet 83. The drive shaft 51 is pressed in the left direction of FIGS. 4 and 1 with a pressing force Left. The first disc spring 13 is compressed by 1 mm by receiving the pressing force Fleft through the movable contact 28, the fixed contact 24, the fixed electrode 23, and the metal disc 22, and the first vacuum switch 2 is moved to the left. While moving, a predetermined contact pressure is applied between the fixed contact 24 and the movable contact 28. The first disc spring 13 functions as a wiping means for securing a contact pressure between the worn contacts when the fixed contact 24 and the movable contact 28 are worn. The first disc spring 13 is used as a drive shaft 51. Accordingly, the mass of the moving part including the drive shaft 51 and the movable yoke 87 is reduced, so that the opening speed can be increased.

  In the state of FIG. 4, when a high-frequency current is passed through the first repulsion coil 67 to generate a magnetic flux Φt, an eddy current is induced in the nearby first repulsion copper plate 61 and a repulsive force is generated. Driven to. As a result, the load is connected to the second power source through the state in which all loads are disconnected (intermediate state) from the state in which the load is connected to the first power source. When switching the power supply at high speed or disconnecting the load from the power supply, the movable electrode 27 and the movable electrode 47 are operated at high speed so that there is no time delay when the first vacuum switch 2 and the second vacuum switch 4 are opened. Therefore, the first repulsive copper plate 61 in the driving device 5 is a copper plate having a large radius that can efficiently generate a large electromagnetic force. On the other hand, when connecting to either power source from the all-power-off state (intermediate state), it is not necessary to close the first vacuum switch 2 or the second vacuum switch 4 so fast, so the second The repulsive copper plate 62 and the third repulsive copper plate 63 are miniaturized using small copper plates having a diameter smaller than the inner diameter of the first repulsive coil 67 and the second repulsive coil 68.

  The force acting on the drive shaft 51 requires a large pressing force to overcome the electromagnetic repulsive force acting between the fixed electrode and the movable electrode when connected to either the first or second power source. Therefore, the magnetic circuit (refer FIG. 4) comprised by the permanent magnet 82 of the magnet apparatus 80, the 2nd protrusion part 87b, and the fixed yoke 81, and the permanent magnet 83, the 2nd protrusion part 87b, and a fixed yoke. The magnetic circuit configured by 81 is configured to generate a force necessary and sufficient to reduce the air gap 88 and apply contact pressure between the contacts. Magnetic circuit (see FIG. 2) composed of permanent magnet 84, first projecting portion 87a and fixed yoke 81, and magnetic circuit composed of permanent magnet 85, first projecting portion 87a and fixed yoke 81 Is the same. On the other hand, in the state disconnected from the first and second power sources, it is sufficient to generate a force sufficient to prevent erroneous input due to vibrations such as earthquakes. Therefore, the air gap 86 is enlarged and the permanent magnet 82 or the permanent magnet 85 is used. The magnetic flux (see FIG. 3) is reduced, and the holding force Fhold is reduced. Thereby, it is possible to reduce the input driving force for connecting the load to either the first or second power source from the state where all the power sources are disconnected, and to reduce the energy consumption of the driving coil device 60.

  By comprising as mentioned above, the 1st and 2nd switches 2 and 4 can be driven with one drive device 5, and there is no possibility that the 1st and 2nd switches 2 and 4 may be in a closed state simultaneously. , Become more reliable. Furthermore, it is possible to realize a switching opening / closing device having three open / close states: a state where one of the first and second switches 2, 4 is closed and a state where both the switches 2, 4 are both open. Further, since the drive coil device 60 includes a first repulsive copper plate 61 as a main repulsive conductor, a second repulsive copper plate 62 and a third repulsive copper plate 63 as sub-repulsive conductors, the first and second repulsive copper plates 63 shown in FIG. In the state in which the two vacuum switches 2 and 4 are both open, the first repulsive copper plate 61 is separated from the first repulsive coil 67 and the second repulsive coil 68 by a considerable distance. When the drive shaft 51 is driven to the right or left to close the vacuum switch, the second repulsion copper plate 62 and the third repulsion copper plate 63 are located near the first and second repulsion coils. The repulsive copper plate 62 or the third repulsive copper plate 63 can efficiently generate a counter-power generation magnetic force, and the drive coil device 60 as an electromagnetic drive device can be miniaturized. Further, since the magnet device 80 having a permanent magnet is used as the three-position stop device, the contact pressure between the contacts of the vacuum switches 2 and 4 can be obtained by the magnetic force of the permanent magnet, and the power consumption can be reduced.

Embodiment 2. FIG.
5 and 6 show a second embodiment of the present invention. FIG. 5 is a cross-sectional view showing the configuration of the switching opening and closing device, and FIG. 6 is an explanatory diagram for explaining the operation. In FIG. 5, the driving device 105 has a magnet device 180 as a three-position stop device. In the magnet device 180, a demagnetizing coil 192, a demagnetizing coil 193, a demagnetizing coil 194, and a demagnetizing coil 195 are wound around the permanent magnet 82, the permanent magnet 83, the permanent magnet 84, and the permanent magnet 85 to demagnetize the respective magnetic forces. ing. Since other configurations are the same as those of the first embodiment shown in FIG. 1, the same reference numerals are given to the corresponding components and the description thereof is omitted.

  Next, the operation will be described. In order to connect the drive shaft 51 in the left direction from the state shown in FIG. 5 in order to connect to either the first or second power source from the all power disconnected state, for example, to connect to the first power source, The demagnetizing coil 192, the demagnetizing coil 193, the demagnetizing coil 194, and the demagnetizing coil 195 are excited to cancel the magnetic flux generated by the permanent magnet 82, the permanent magnet 83, the permanent magnet 84, and the permanent magnet 85, and the holding force to the intermediate position Fhold is almost zero or greatly reduced. Next, when a high-frequency current is passed through the second repulsion coil 68, the electromagnetic repulsion force Frepc acts between the eddy current induced in the first repulsion copper plate 61 and the electromagnetic repulsion force Frepc exceeds the holding force Fhold. The movable part including the shaft 51 and the movable yoke 87 is driven leftward in FIG. 5, and the holding force Fhold is suddenly weakened and further accelerated leftward.

  When the movable part including the drive shaft 51 and the movable yoke 87 is driven to the left and the movable contact 28 of the first vacuum switch 2 comes into contact with the fixed electrode 23, the kinetic energy of the movable part and the magnetic force of the permanent magnets 82 and 83 are obtained. As a result, the movable contact 28 compresses the first disc spring 13 via the fixed electrode 23 and the metal disk 22 and is further driven leftward so that the movable yoke 87 contacts the fixed yoke 81. At this time, the movable contact 28 of the first vacuum switch 2 is formed by the first permanent magnet 82 and the magnetic flux Φ4 passing through the movable yoke 87 and the fixed yoke 81 and the second permanent magnet 83 as shown in FIG. The disc spring 13 is compressed by a predetermined size by compressing the disc spring 13 by a predetermined size by a magnetic flux (not shown) similar to the magnetic flux Φ4, which is made and passes through the movable yoke 87 and the fixed yoke 81, and both contacts 24, 25 are compressed. A necessary contact pressure is applied between them.

  With this configuration, in the closing operation in which the load is connected from the intermediate position to one of the first and second power supplies, the holding force Fhold can be set to almost zero or any small value during the operation. The first to third repulsive copper plates 61 to 63 and the first and second repulsive coils 67 and 68 for driving the movable part including the movable yoke 87 can be reduced in size. Further, the switching operation can be surely performed quickly.

Embodiment 3 FIG.
FIG. 7 is a cross-sectional view showing a configuration of a switching opening / closing device according to Embodiment 3 of the present invention. The difference from the first embodiment is that the drive coil device 260 is driven as the electromagnetic drive device of the drive device 205 to drive the drive shaft 51 in order to connect to the first or second power source from the intermediate position. The second repulsive copper plate 62 and the third repulsive copper plate 63 are eliminated, and in the magnet device 280 serving as a three-position stop device, a permanent magnet is not attached to the fixed yoke 281, but instead the protruding portions 281 a, 281 b, 281 c, and 281 d are provided. The permanent magnets 282 and 283 are respectively attached to the upper and lower sides of the movable yoke 287, and the drive coils 291 and 292 are also provided. Since other configurations are the same as those of the first embodiment shown in FIG. 1, the same reference numerals are given to the corresponding components and the description thereof is omitted.

  Next, the operation will be described. In the state at the intermediate position, the drive shaft 51 is fixed at the intermediate position by the magnetic flux Φpm passing through the movable yoke 287 and the fixed yoke 281 by the permanent magnets 282 and 283. Here, the drive coil 291 is excited to generate a magnetic flux Φc indicated by an arrow line, and the magnetic flux Φpm by the permanent magnets 282 and 283 generating the holding force is partially canceled and a magnetic force in the left direction is generated to generate the drive shaft 51. Drive to the left. When driving to the right, the magnetic flux Φpm generated by the permanent magnet is partially canceled by another magnetic flux generated by exciting the drive coil 292 and a magnetic force for driving in the right direction is generated to drive the drive shaft 51 to the right.

  If comprised in this way, in the making operation | movement which does not need to drive especially at high speed, only the drive coils 291 and 292 are added, and the electromagnetic attraction force by the drive coils 291 and 292 that is more efficient than the repulsion coil method is used. Therefore, it is possible to drive with a small amount of energy and to reduce the size of the drive power supply part.

Embodiment 4 FIG.
FIG. 8 is a cross-sectional view showing a configuration of a switching opening / closing device according to Embodiment 4 of the present invention.
In the above first to third embodiments, the example in which the first and second vacuum switches 2 and 4 and the driving devices 5, 105, and 205 are arranged on the same axis D is shown, but the present invention is not limited to this. For example, the central axis A of the first vacuum switch 2 and the central axis B of the second vacuum switch 4 are arranged in parallel so that they are parallel to each other. You may make it arrange | position so that a moving direction (center axis C) may become parallel. That is, as shown in FIG. 8, the first vacuum switch 2, the driving device 5, and the second vacuum switch 4 are overlapped in the vertical direction in FIG. The vacuum switches 4 are arranged in parallel so that the central axes A, C, B are parallel. Then, the right end portion of the drive shaft 51 of the drive device 5 and the right end portion of the movable electrode 17 of the first vacuum switch 2 are connected by a connecting member 311. Further, the left end portion of the drive shaft 51 of the drive device 5 and the left end portion of the movable electrode 47 of the second vacuum switch 4 are connected by a connecting member 312. In addition, although a reinforcement member, a movement guide, etc. are provided in these connection parts suitably, illustration is omitted. Thus, if the first vacuum switch 2, the drive device 5, and the second vacuum switch 4 are arranged in parallel, the overall length of the switching opening / closing device in the moving direction of the drive shaft 51 can be shortened.
In each of the above embodiments, the switch is not limited to the vacuum switch, and the same effect can be obtained even with a disconnector or other switch in which the switching contact is linearly driven.

As described above, according to the switching opening and closing device according to the present invention,
Having first and second switches and a driving device,
The first switch has first and second contacts disposed opposite to each other,
The second switch has third and fourth contacts arranged opposite to each other,
The drive device includes a drive shaft, a three-position stop device, and an electromagnetic drive device. The drive shaft, the three-position stop device, and the electromagnetic drive device are connected, and the drive shaft is driven by the electromagnetic drive device and linearly moves in a predetermined direction. With the three-position stop device, the first and second positions and the third position between the first and second positions can be stably stopped,
Driving the first and third contacts in a predetermined direction by the drive shaft closes the first switch at the first position and opens the second switch to drive in the direction opposite to the predetermined direction. Since the first switch is opened at the second position and the second switch is closed, and the first and second switches are both opened at the third position.
There is no fear that the first and second switches are closed at the same time, switching can be performed reliably, and a state where both the first and second switching contacts are open can be realized.

  And the 1st and 2nd contact of a 1st switch, the drive shaft of a drive device, and the 3rd and 4th contact of a 2nd switch shall be arranged almost linearly in this order. Since both are on the same straight line, the operation can be simplified, and the configuration can be simplified.

  In the first switch, the first and second contacts are arranged opposite to each other on the first axis, and in the second switch, the third and fourth contacts are on the second axis parallel to the first axis. The drive shaft of the drive device is linearly moved in a direction parallel to the first and second axes, so that the entire length of the switching opening / closing device in the direction of movement of the drive shaft is Can be shortened.

  The first contact of the first switch and the third contact of the second switch are supported by a support frame via an elastic member that is elastically deformable in the moving direction of the drive shaft, and the elastic member Is elastically deformed by receiving a predetermined force from the drive shaft via the second or fourth contact and elastically deforms by a predetermined dimension to allow the movement of the first or third contact. Therefore, the elastic member functions as a wiping means for securing the contact pressure between the worn contacts when the first and second contacts are worn and when the third and fourth contacts are worn. Since the mass of the moving part including the drive shaft and the movable yoke does not need to be driven by the shaft, the opening speed can be increased.

  The three-position stop device is characterized by having a permanent magnet and stably stopping the drive shaft at the first, third, and second positions by the magnetic force of the permanent magnet. By using a magnet, the energy consumption can be reduced and the structure can be simplified.

  The three-position stop device is provided with a movable yoke fixed to the drive shaft and a fixed yoke having opposing portions respectively opposed to both ends of the movable yoke in the movement direction of the drive shaft, and the drive shaft moves in a predetermined direction. When one of the two ends of the movable yoke is in contact with one of the opposing portions of the fixed yoke, and the other end of the movable yoke is in contact with the other of the opposing portions of the fixed yoke. The magnetic force acting between the fixed yoke and the movable yoke due to the magnetic flux passing between the movable yoke and the fixed yoke by the permanent magnet is such that the movable yoke is in contact with one or the other of the opposing portions of the fixed yoke. Since it is characterized by a stable state at three positions when it is not in contact with any of the opposing portions, a simple three-position stop device can be realized with such a configuration

  The three-position stop device is characterized in that an air gap is provided in a magnetic circuit through which a magnetic flux by a permanent magnet passes in an intermediate stable position where the movable yoke is not in contact with any of the opposed portions of the fixed yoke. By changing the length of the gap, the magnetic flux passing through the magnetic circuit can be adjusted, and the holding force at the intermediate position can be freely set.

  The electromagnetic drive device has an electromagnetic coil device and an eddy current repulsion device, and the eddy current repulsion device is fixed to the drive shaft, and a current flows through the electromagnetic coil device. Since the drive shaft is driven, a simple electromagnetic drive device can be realized with such a configuration.

  The electromagnetic coil device has a pair of annular repulsion coils disposed concentrically with the drive shaft, and the eddy current repulsion device has a repulsion conductor fixed to the drive shaft and provided between the pair of repulsion coils. Therefore, the electromagnetic drive device can be realized with a simple configuration in which a repulsive conductor is provided between a pair of repulsive coils.

  The repulsive conductor has a size in the direction orthogonal to the moving direction of the drive shaft, and the size in the direction orthogonal to the moving direction of the drive shaft and the size of the main repulsive conductor in the direction orthogonal to the moving direction of the drive shaft. A plurality of sub-repulsive conductors made smaller than the first or second switch from the middle stable position by providing the sub-repulsive conductors. The generation efficiency of the repulsive force when moving the drive shaft can be increased.

  The electromagnetic drive device reduces the magnetic flux generated by the permanent magnet at three positions to a predetermined level or less and generates a magnetic force between the fixed yoke and the movable yoke to move the movable yoke between the three positions. Therefore, when the drive shaft is moved so as to close the first or second switch from an intermediate stable position, the drive is efficiently performed simply by adding a drive coil. be able to.

It is sectional drawing which shows the structure of the switching switch apparatus which is Embodiment 1 for implementing this invention. It is explanatory drawing for demonstrating operation | movement of the switching opening / closing apparatus of FIG. It is explanatory drawing for demonstrating operation | movement of the switching opening / closing apparatus of FIG. It is explanatory drawing for demonstrating operation | movement of the switching opening / closing apparatus of FIG. It is sectional drawing which shows the structure of the switching switch apparatus which is Embodiment 2 for implementing this invention. It is explanatory drawing for demonstrating operation | movement of the switching opening / closing apparatus of FIG. It is sectional drawing which shows the structure of the switching switch apparatus which is Embodiment 3 for implementing this invention. It is sectional drawing which shows the structure of the switching switch apparatus which is Embodiment 4 for implementing this invention.

Explanation of symbols

2 first vacuum switch, 4 second vacuum switch, 5 drive unit,
13 First Belleville Spring, 18 Second Belleville Spring, 23 Fixed Electrode, 24 Fixed Contact,
27 movable electrode, 28 movable contact, 43 fixed electrode, 44 fixed contact, 47 movable electrode,
48 movable contacts, 51 drive shaft, 60 drive coil device, 80 magnet device,
105 drive device, 180 magnet device, 192-195 demagnetizing coil,
205 driving device, 260 driving coil device, 280 magnet device,
291,292 Driving coils.

Claims (11)

Having first and second switches and a driving device,
The first switch has first and second contacts arranged opposite to each other,
The second switch has third and fourth contacts arranged opposite to each other,
The drive device includes a drive shaft, a three-position stop device, and an electromagnetic drive device. The drive shaft, the three-position stop device, and the electromagnetic drive device are connected, and the drive shaft is driven by the electromagnetic drive device. It moves linearly in a predetermined direction and can be stably stopped at the first and second positions and the third position between the first and second positions by the three-position stop device.
By driving the first and third contacts in a predetermined direction by the drive shaft, the first switch is closed at the first position and the second switch is opened. Driving in the reverse direction opens the first switch in the second position and closes the second switch, and opens the first and second switches in the third position. A switching opening and closing device that opens both. The first and second contacts of the first switch, the drive shaft of the driving device, and the third and fourth contacts of the second switch are arranged in a substantially linear order in this order. The switching opening and closing device according to claim 1. The first switch has the first and second contacts opposed to each other on a first axis, and the second switch has the third and fourth contacts parallel to the first axis. 2. The switching opening and closing according to claim 1, wherein the switching shaft is disposed opposite to the second axis, and the drive shaft of the drive device linearly moves in a direction parallel to the first and second axes. apparatus. The first contact of the first switch and the third contact of the second switch are supported by a support frame via an elastic member that is elastically deformable in the moving direction of the drive shaft. The elastic member is elastically deformed by receiving a predetermined force from the drive shaft via the second or fourth contact and elastically deforms by a predetermined dimension to allow the first or third contact to move. The switching opening and closing device according to claim 1, wherein: The three-position stop device has a permanent magnet and stably stops the drive shaft at the three positions of the first, third, and second positions by the magnetic force of the permanent magnet. The switching opening and closing device according to claim 1. The three-position stop device includes a movable yoke fixed to the drive shaft and a fixed yoke having opposing portions respectively opposed to both ends of the movable yoke in the moving direction of the drive shaft. Is moved in a predetermined direction, one of both end portions of the movable yoke is brought into contact with one of the opposing portions of the fixed yoke, and when the other end portion of the movable yoke is moved in the direction opposite to the predetermined direction, the other end portion of the movable yoke is The magnetic force acting between the fixed yoke and the movable yoke by the magnetic flux passing through the movable yoke and the fixed yoke by the permanent magnet is adapted to contact the other of the opposing portions of the fixed yoke. It is stable at three positions when the yoke is in contact with one or the other of the opposed portions of the fixed yoke and when it is not in contact with any of the opposed portions. Switching switchgear according to claim 5, characterized in. The three-position stop device is characterized in that an air gap is provided in a magnetic circuit through which the magnetic flux by the permanent magnet passes in the intermediate stable position where the movable yoke is not in contact with any of the opposed portions of the fixed yoke. The switching opening and closing device according to claim 6. The electromagnetic drive device includes an electromagnetic coil device and an eddy current repulsion device, and the eddy current repulsion device is fixed to the drive shaft, and a current is passed through the electromagnetic coil device to cause the eddy current repulsion device to The switching opening and closing device according to claim 1, wherein the drive shaft is driven by the generated electromagnetic repulsion force. The electromagnetic coil device has a pair of annular repulsion coils disposed concentrically with the drive shaft, and the eddy current repulsion device is fixed to the drive shaft and provided between the pair of repulsion coils. The switching opening and closing device according to claim 8, wherein the switching opening and closing device has a conductor. The repulsion conductor has a main repulsion conductor whose size in the direction orthogonal to the movement direction of the drive shaft is substantially the same as that of the repulsion coil, and a size in the direction orthogonal to the movement direction of the drive shaft. 9. The switching opening / closing device according to claim 8, wherein the switching opening / closing device has a plurality of sub-repulsive conductors smaller than the inner dimension of the coil. The electromagnetic drive device reduces the magnetic flux generated by the permanent magnets at the three positions to a predetermined level or less and generates a magnetic force between the fixed yoke and the movable yoke to cause the movable yoke to move to the three positions. 6. The switching opening and closing device according to claim 5, further comprising a drive coil that moves between the two.

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