JP2016115504A - Gas circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas circuit breaker of low cost, which is reduced in current required for deceleration by adding attenuation from outside during braking of a movable piece.SOLUTION: A gas circuit breaker has in an operating-part case 110 an operating part 100 including: a breaking part with a pair of contact pieces provided opposite each other in a breaking-part case 1; a movable element 141 in which the magnetic poles of permanent magnets 142 are alternately inverted, at the same time, are arranged on the same axis as the operation axis of contact pieces, and are integrated by a fixing member; and a stator 131 arranged opposite the movable element and composed of a plurality of magnetic poles having a coil. A dumper-device case 154 is provided on the operation axis of the movable element 141 and at the end of the operation-part case 110 opposite the breaking-part case 1. The guide part 157 of the movable element is sandwiched between the dumper-device case 154 and the end face of the operation-part case 110, and they are fastened together with a bolt 156 screwed on an axis parallel to the operation axis of the movable element 141.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a gas circuit breaker, and more particularly to an electrically driven gas circuit breaker that is operated electrically to cut off a high voltage.

  It is important to ensure reliability because the circuit breaker has a role to prevent the accident of the power system by quickly interrupting the accident current. There are two types of gas circuit breakers, the double pressure method and the single pressure method (puffer type), depending on the gas spraying means. Currently, puffer type gas circuit breakers that can be downsized and simplified are the mainstream. 1 is described.

In general, a puffer-type gas circuit breaker has a six-flux with good insulation performance and arc-extinguishing performance, as well as a breaker composed of a stationary contact, a movable contact and other parts in a grounded metal container. It is filled with an insulating gas such as sulfur fluoride (SF ₆ ). In the puffer type gas circuit breaker, one of the main performances, the advanced small current interruption performance, depends largely on the moving speed of the mover, and in order to improve the interruption performance from the past, a full stroke is started from the start of the movable contactor. The device has been devised to shorten the time until this (this is called “opening time”).

  On the other hand, as an operating device for operating the gas circuit breaker, a spring operating device that obtains the operating force by releasing the spring force accumulated in the operating spring, and an operating force that uses air pressure or hydraulic pressure is obtained. Conventionally known pneumatic and hydraulic actuators are known.

  The spring actuator is excellent in low operating force, maintainability and economy. The pneumatic actuator is easy to handle and provides high operating force. Furthermore, the hydraulic actuator provides low operating force with low noise. There is a feature.

  However, there is room for improvement in the reliability of the operation due to the fact that the elastic force of the spring is not always constant, the positioning accuracy of the spring is not necessarily high, and it is composed of many complicated parts in the operation by the spring operating device. In addition, in the operation method using hydraulic pressure or air pressure, the working fluid may leak due to changes in ambient temperature, and if there is a malfunction or failure in a part of the part, the whole may not work. There is also an aspect that is not easy.

  Here, as an example of a method for improving the above points, there is a technique described in Patent Document 2, for example, as a technique for generating an operation force by an electric force. Patent Document 2 discloses an actuator structure that supplies a current to a linearly movable coil, and uses a repulsive force against a magnetic field force generated from a stator made of a cylindrical permanent magnet to provide a mover made of a coil. An insulating rod connected to the mover by relative movement with the stator and a circuit breaker configuration for linearly moving the movable contact are described.

JP 2010-160921 A JP 2013-229247 A

  In the actuator described in Patent Document 2, it is necessary to accelerate the stopped movable element to the maximum speed in a very short time in order to shorten the opening time, and to brake and stop in a short time when approaching the full stroke. . In the actuator, since the mover is accelerated / decelerated by the current supplied from the power supply device, a large current is required when the mover is accelerated / decelerated. Particularly during braking, it is necessary to counter the inertial force of the mover moving at high speed, and it is necessary to supply a current larger than the current during acceleration. A gas breaker for high voltage requires a large-capacity power supply device, and as a result, the cost of the gas breaker may increase.

  In the actuator described in Patent Document 2, a spring is provided at the movable direction end of the actuator mover. The spring is provided in the vicinity of the moving element end position to prevent the mover from exceeding the breaking operation amount and colliding with the operation unit case, and does not assist the moving element in braking. The effect of reducing the current cannot be expected.

  Further, in the configuration of the actuator described in Patent Document 2, vibration accompanied by bending deformation occurs in the direction orthogonal to the movable axis when the mover of the actuator collides with a buffering spring provided at the end portion in the movable direction. Since the magnetic force generated as the gap between the stator and the mover becomes smaller becomes larger, the current required for acceleration / deceleration can be reduced. However, the vibration of the mover causes a deviation in the gap between the mover and the stator. As a result, an attractive force acts between the stator and the mover in the direction opposite to the operation direction, and as a result, the current required for the operation of the mover may increase.

  In order to solve the above problems, a gas circuit breaker according to the present invention includes a breaker having a pair of contacts provided facing each other in a breaker case filled with an insulating gas, and a permanent magnet or a magnetic material. A movable element that is arranged coaxially with the operation axis of the contactor while being alternately inverted and configured integrally with a fixed member, and a plurality of magnetic poles that are arranged opposite to the movable element and have windings. A gas circuit breaker having an operation unit having a stator in an operation unit case, wherein a damper device case is provided on an end of the operation unit case opposite to the operation unit case on the operation axis. The guide part of the mover is sandwiched between the damper device case and the end face of the operation part case, and is fastened together with a bolt fastened on an axis parallel to the operation axis of the mover.

  According to the present invention, the current required for deceleration can be reduced by applying a damping force from the outside to the mover during braking of the mover that requires the largest current. Since the power supply capacity can be reduced, a low-cost gas circuit breaker can be provided.

It is sectional drawing of the gas circuit breaker (closed-circuit state) which concerns on Example 1. FIG. FIG. 3 is a cross-sectional view of an example of an operation unit according to the first embodiment. It is sectional drawing of the gas circuit breaker (opening state) which concerns on Example 1. FIG. 1 is a schematic perspective view of an actuator according to Example 1. FIG. FIG. 5 is a front view of FIG. 4. It is a figure which shows the state which remove | excluded the coil | winding from FIG. 2 is an example of a cross-sectional configuration of an actuator applied to the gas circuit breaker according to the first embodiment. FIG. 3 is a cross-sectional view of an example of an operation unit according to the first embodiment when braking is started. 3 is a cross-sectional view of an example of an operation unit according to Embodiment 1 in a closed state. FIG. 1 is a cross-sectional view of an example of a damper device according to a first embodiment. It is sectional drawing of the other example of the damper apparatus which concerns on Example 1. FIG. It is a figure explaining the interruption | blocking characteristic of the gas circuit breaker which concerns on this invention. FIG. 6 is a cross-sectional view of another example of the operation unit according to the first embodiment. FIG. 6 is a cross-sectional view of another example of the operation unit according to the first embodiment. 6 is a schematic perspective view of a mover of an actuator according to Embodiment 2. FIG. It is a side view of the guide part and needle | mover which concern on Example 2. FIG.

  Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. In addition, the following is an example to the last, Comprising: It is not the meaning which intends to limit the content of invention to the following specific aspect. The invention itself can be modified into various modes within the scope of the claims.

  Example 1 will be described with reference to FIGS. 1 shows a closed state of a gas circuit breaker having an operation unit structure according to the present invention, FIG. 2 is a detailed view of the operation unit of FIG. 1, and FIG. 3 is a diagram of a gas circuit breaker having an operation unit structure according to the present invention. Indicates an open state. As shown in the figure, the gas circuit breaker according to the present embodiment is constituted by a shut-off portion for shutting down an accident current, and an operation portion for operating the shut-off portion at the side of the shut-off portion.

The blocking part is provided in the blocking part case 1 of the metal container. The blocking part case 1 is filled with SF ₆ gas and sealed, and the fixed side electrode 3 fixed to the insulating support spacer 2 provided at the end of the blocking part case 1, the movable side electrode 4, and the movable side electrode 4 A movable electrode 6 and a nozzle 5 provided on the operation part, an insulating support cylinder 7 connected to the movable side electrode 4 and connected to the movable side electrode 4, and a main circuit which is connected to the movable side electrode 4 and constitutes a part of the main circuit And a high-voltage conductor 8 serving as a conductor.

  In this configuration, current can be turned on and off by moving the movable electrode 6 in the Z direction (lateral direction in FIGS. 1 and 2) through a driving force from the operation unit and electrically opening and closing it. Around the high voltage conductor 8, a current transformer 51 is provided that functions as a current detector for detecting a current flowing through the high voltage conductor 8. An insulating rod 81 connected to the operation portion is disposed in the insulating support cylinder 7. The insulating rod 81 is extended into the operation unit 100 provided adjacent to the blocking unit through a linear seal unit 82 provided so that the sealed blocking unit case 1 can be driven while being kept airtight.

  The operation unit 100 includes an actuator 130 in the operation unit case 110 and is fixed to the blocking unit case 1. The actuator 130 includes a mover 141 that is connected to the insulating rod 81 through the straight seal portion 82 and moves linearly, and a stator unit 135 that is disposed to face the mover 141.

  The actuator 130 is electrically connected to the power supply unit 161 through a sealed terminal 163 provided in the operation unit case 110. The power supply unit 161 is connected to the control unit 162 and configured to receive a command from the control unit 162. The current value detected by the current transformer 51 is input to the control unit 162. The power supply unit 161 and the control unit 162 function as a control mechanism that changes the amount and phase of a current supplied to a later-described winding 136 of the actuator 130 according to the current value detected by the current transformer 51.

  A mover and a stator constituting the actuator 130 will be described with reference to FIGS. 4 is a schematic perspective view of the actuator 130, FIG. 5 is a front view of the stator 131, FIG. 6 is a view showing a state where the winding 136 is removed from FIG. 5, and FIG.

  The stator 131 includes a first magnetic pole 132, a second magnetic pole 133 disposed to face the first magnetic pole 132, a magnetic body 134 that connects the first magnetic pole and the second magnetic pole, And the winding 136 provided on the inner periphery of the second magnetic pole. Inside the stator 131, a gap is provided between the first magnetic pole 132 and the second magnetic pole 133, and the permanent magnet 142 is disposed in this gap. The permanent magnet 142 is magnetized in the Y direction (vertical direction in FIGS. 4 to 6), and is magnetized alternately for each adjacent magnet.

  In general, an attractive force (force in the Y direction) is generated between the permanent magnet 142 and the first magnetic pole 132 and the second magnetic pole 133. However, in this configuration, the attractive force generated in the permanent magnet 142 and the first magnetic pole 132 and the attractive force generated in the permanent magnet 142 and the second magnetic pole 133 are opposite to each other, so that the forces are offset and attracted. The power is reduced. Therefore, the mechanism for holding the mover 141 can be simplified, and the mass of the movable body including the mover 141 can be reduced. Since the mass of the movable body can be reduced, high acceleration driving and high response driving can be realized.

  During driving, a magnetic field is generated by passing a current through the winding 136, and an electromagnetic force is applied to the stator 131 that constitutes the first and second magnetic poles and the movable element 141 that constitutes the permanent magnet 142 in the Z-axis direction. Will occur. The interruption operation is performed by the linear motion of the mover 141 using the electromagnetic force as a thrust.

  FIG. 7 shows an example of an actuator 130 configured by a stator unit 135 including a plurality of stators 131. Spacers 137 are arranged between a plurality of stators 131 arranged in the Z direction (horizontal direction in FIG. 7), and a stator unit 135 is configured. Guide roller units 138 are arranged at both ends of the stator unit 135. The guide roller unit 138 is configured to support the movable element 141 sandwiched in the vertical direction by the roller.

  The mover 141 includes a permanent magnet 142 disposed in a gap provided between the first magnetic pole 132 and the second magnetic pole 133, and a magnet fixing member 143 that sandwiches and supports the permanent magnet 142. The interval between the permanent magnet 142 and the stator 131 is maintained by guide roller units 138 disposed at both ends of the stator unit.

  A damper device 151 is provided from the outside of the operation unit case 110 on the operation axis of the mover 141 and at the end of the operation unit case opposite to the blocking unit case (FIG. 8). The damper device 151 includes a damper device case 154 fixed to the operation unit case 110, a damper 152, a return spring 153, and a damper piston 155. The damper 152 has the property that the drag increases in proportion to the speed. The return spring 153 is provided to return the damper piston 155 to a predetermined position.

  The blocking operation and the function of the damper device 151 will be described with reference to FIGS. 2, 8, and 9. 8 shows a state in which the mover 141 of the actuator 130 moves in the breaking direction (+ Z direction in the figure) and contacts the damper device 151, and FIG. 9 stops after the mover 141 further moves in the breaking direction from the state of FIG. Indicates the state.

  When the mover 141 moves in the + Z direction for the blocking operation, the end of the mover 141 comes into contact with the damper piston 155 through the opening provided in the cover 114 (FIG. 8). When the mover 141 further pushes the damper piston 155 in the + Z direction, a damping force from the damper 152 and an elastic force from the return spring 153 act on the damper piston 155, and the mover 141 is decelerated and eventually stops (see FIG. 9).

  In the closing operation, the mover 141 moves in the −Z direction from the position (FIG. 9) at the end of the blocking operation. At this time, a restoring force acts on the damper piston 155 from the return spring 153, and the damper piston 155 returns to the natural length position of the return spring 153 (FIG. 2).

  As described above, the damper device 151 attenuates the operating speed of the mover 141 from a predetermined position during the shut-off operation, and works to return the damper piston 155 to the predetermined position by the return spring 153 during the closing operation. It is desirable that the predetermined position of the damper piston 155 is determined in accordance with a cutoff operation mode described later.

  The damper 152 in the damper device 151 is not particularly limited as long as the speed can be reduced. For example, FIG. 10 shows a configuration of a hydraulic damper. The hydraulic damper device 251 includes a cylinder 252 and a damper piston 254, and the cylinder 252 is filled with oil. The cylinder 252 is provided with an opening 255 for oil replacement. A return coil spring 253 is provided between the cylinder 252 and the damper piston 254.

  As another example of the damper device, FIG. 11 shows a configuration using a pneumatic damper. The pneumatic damper device 261 includes a cylinder 262 filled with gas and a damper piston 264. The return coil spring 263 is accommodated in the cylinder 262. When the damper piston 264 is pushed in the + Z direction in the figure, the volume inside the cylinder 262 changes. Due to this volume change, air flows from the opening 265 provided in the damper piston 264 to the outside. The damping function of the damper works by the resistance force that acts when the gas flows through the opening.

  In any of the damper configurations, the movable element 141 vibrates in the Y direction or the X direction in the figure by the impact at the moment of contact with the damper piston 155. A minute gap is provided in the Y direction in the figure between the stator 131 and the mover 141. When the mover 141 vibrates in the Y direction, the permanent magnet 142 and the first magnetic pole of the mover 141 are provided. There is a possibility that a deviation may occur in the distance between the permanent magnet 142 and the distance between the permanent magnet 142 and the second magnetic pole 133. As a result, an attractive force acts between the first magnetic pole 132 or the second magnetic pole 133 and the permanent magnet, and a load in the Y direction is applied to the movable body including the mover 141. As a countermeasure, if the mover 141 is made highly durable, the mass of the movable body may increase.

  In this embodiment, a guide portion 157 is provided as shown in FIG. 2 in order to mitigate vibrations of the mover 141 in the Y direction and the X direction. The guide portion 157 is provided between the damper device case 154 and the end surface of the operation portion case 110, and is fixed by being fastened together with a bolt 156 that is fastened on an axis parallel to the operation axis of the mover 141.

  The guide portion 157 includes a contact member 158 that guides the mover to the damper device, and a holding member 159 that holds the contact member. The contact member 158 is constituted by, for example, a wear ring. The wear member is fitted into a groove on the inner wall of the holding member, and the mover and the wear ring are configured to slide in contact with each other when the mover 141 is inserted into the guide portion. To do.

  By configuring the guide portion 157 to contact the mover 141 as described above, vibration that occurs when the mover 141 comes into contact with the damper piston 155 can be suppressed. As a result, the rigidity required for the mover 141 is reduced, and as a result, the mover can be reduced in weight.

  Although an example of a wear ring has been described as the contact member 158 of the guide portion 157, a cushioning material such as packing or an O-ring may be used. The vibration of the mover 141 can be reduced by elastic deformation and viscous damping of the buffer material.

  Moreover, the contact member 158 of the guide part 157 may have a rotatable roller such as a roller guide, a linear bush, a roller bearing, a cam follower, or a thrust bearing. The movable element 141 is not limited to this as long as it can move in the Z direction and can suppress vibration in the Y direction or the X direction.

  The contact member 158 is preferably non-magnetic, such as a non-magnetic stainless alloy or aluminum alloy, but is not limited thereto. When the contact member 158 is made of a non-magnetic material, no magnetic force is generated between the mover 141 and the permanent magnet 142, so that the load in the operation direction applied to the mover can be reduced, resulting in a light weight of the mover. Can be

Next, an example of the procedure for assembling the operation unit will be described with reference to FIG.
(1) The mover 141 is inserted into the stator unit 135 fixed to the stator unit support member 111. (2) The cover 114 is fixed to the stator unit support member 111 using the bolt 115. (3) The guide portion 157 is tightened from the direction parallel to the movable operation axis using the bolt 164 and temporarily fixed to the operation portion case. (4) After adjusting the position of the guide part 157 while moving it manually so that the guide part and the mover 141 come into contact with each other, the bolt 164 is tightened. (5) The damper device 151 is fixed to the operation unit case with the bolt 156 from the Z direction. (6) The operation unit case 110 is brought close to the blocking unit case 1 and the mover 141 is connected to the insulating rod 81. (7) The operation unit case 110 and the blocking unit case 1 are fixed with bolts 113 at the flange 112 of the operation unit case 110.

  As described above, the damper device 151, the guide portion 157, and the operation portion case 110 are configured to be fastened to the blocking portion case 1 with bolts from the operation axis direction (Z direction in the drawing). The damper device 151 has a damping force reaction force for braking the mover 141 acting in the Z direction, and the guide portion has a force acting in the Z direction due to a frictional force at the time of sliding. The bolt to which the case 110 is fixed is configured so that a load in the axial direction of the bolt acts. Accordingly, it is possible to provide a damper device, a guide portion, and an operation portion case that are highly reliable against slipping or loosening of bolts.

The gas circuit breaker according to the present embodiment configured as described above shifts from the closed state in FIG. 1 to the open state in FIG. At that time, the arc plasma is extinguished by blowing SF ₆ gas having arc extinguishing performance to the arc generated in the interrupting section, and the current is interrupted.

  FIG. 12 shows, in time series, the displacement of the movable electrode 4 during the cutoff operation, the cutoff current, the voltage between the electrodes, and the drive current input to the winding 136 to move the mover 141 of the actuator 130. The breaker mainly operates in three break modes. In any break mode, it is necessary to accelerate the movable electrode that stops in the early stage of the break operation, and to decelerate and stop the movable part electrode in the final stage of the break operation. is there.

  In FIG. 12, symbol S in the drawing indicates the operation of the blocking unit, which moves from the closing position “C” to the blocking position “O”. In the three modes of current interruption, the operation characteristics at the beginning of the interruption operation are S1C, S2C, S3C, and the operation characteristics at the end of the interruption operation are S1O, S2O, S3O.

  The waveform of the cut-off current shown in FIG. 12 can be detected by the current detection current transformer 51 shown in FIGS. 1 to 3, and the detected current waveform is input to the control unit 162 for optimal operation. It is possible to realize. An example of controlling the operation depending on the breaking current will be described below.

  First, the normal cutoff operation (normal mode) will be described. In FIG. 12, in the normal mode, it moves from the closing position “C” to the blocking position “O” according to the thick line S1. The movable side electrode 4 of the blocking portion reaches the electrode opening position at time t1 when the movable side electrode 4 moves to a preset sliding distance W1.

  By causing the drive current I1C to flow in the drive direction (plus direction in FIG. 12), the mover 141 starts to move. The current is interrupted by reaching the current zero point at time t2 after the opening (S1C). Symbol V is a voltage waveform between the electrodes, and appears between the electrodes after time t2 when the current is interrupted. In the normal mode, the withstand voltage V2 between the electrodes is not lower than the voltage V1 between the electrodes after the interruption (S1O). When the operating position S approaches the cutoff position O, a current that is applied to the mover is applied in a direction opposite to that during driving (a minus direction in FIG. 12), thereby applying a deceleration force to the mover (I1O). The operation in this case is the reference.

  Next, the operation when a small current is cut off (small current mode) will be described. In this case, a phase advance load interruption in the power transmission system is targeted, and the current value is a small current of several tens to several hundred amperes or less. Since the current is small, the interruption is easy, and the current is interrupted at the zero point of time t2 that first appears after the opening time t1 (S2C). Here, when the phase advance load is cut off, a voltage corresponding to the power supply voltage peak value remains on the load side, so that a voltage twice as high as the power supply voltage is applied between the electrodes. On the other hand, the withstand voltage V2 between the breaker poles also increases with time.

  In the case of phase advance load interruption, if the interelectrode voltage V1 exceeds the withstand voltage V2, dielectric breakdown occurs between the electrodes. Therefore, when the current transformer 51 determines that the current mode is the low current mode, the current input to the actuator 130 is controlled so as to drive with the operation characteristic S2 faster than the operation characteristic S1 in the normal mode (S2O). As a result, the withstand voltage recovery characteristic can be accelerated like V3 rather than the withstand voltage characteristic V2 between the electrodes in the normal mode. Since braking can be performed over time compared to the normal mode, the mover stops at a driving current I2O smaller than the driving current I1O for braking in the normal mode.

  Next, an operation when a large current is interrupted (large current mode) will be described. In this case, the pressure rise at the interruption portion due to the arc energy is large and the reaction force to the operation portion is also large, so that the operation characteristic S3 is slower than the operation characteristic S1 in the normal mode (S3C, S3O). For this reason, the driving current I3O required for braking needs to flow more than the other modes.

  In any cutoff mode, the absolute value of the drive current is the maximum current required for braking. In particular, the braking current I3O in the large current mode needs to flow the largest amount of current. Therefore, it is necessary to prepare a power supply unit 161 capable of sufficiently flowing I3O. However, by configuring the movable element to contact the damper piston during braking as shown in FIGS. 8 and 9, the current required for braking can be increased. Can be reduced. As a result, the capacity of the power supply unit 161 is reduced, and a low-cost gas circuit breaker can be provided.

  Further, as described above, the damper device 151 is fastened and fixed from the direction parallel to the operation axis by the operation unit case 110 and the bolt 156, and the operation unit case 110 is further fixed to the blocking unit case 1 from the direction parallel to the operation axis by the bolt 113. It is configured to be fastened and fixed. The load received by the damper device 151 to brake the movable element 141 is supported by the operation unit case 110 and the blocking unit case 1 through a fixing structure using bolts. Since the load in the direction parallel to the operation axis can be rigidly supported by the entire case member constituting the gas circuit breaker as described above, the overall deformation can be suppressed and the rigidity of each component member can be reduced.

  1 to 12, the damper device 151 is fixed from the outside of the operation unit case 110, but the damper device 151 may be configured in the operation unit case 110 as shown in FIG.

  Further, as shown in FIG. 14, a mover end flange 271 may be provided at the end of the mover 141. The contact surface when the movable element 141 contacts the damper piston 155 of the damper device 151 during the blocking operation can be expanded. Since the contact surface pressure can be reduced, a highly reliable gas circuit breaker can be provided as a result.

  Below, 2nd Embodiment of the gas circuit breaker based on this invention is described based on FIG. 15 and FIG.

  FIG. 15 shows the mover 141 in this embodiment. The mover includes a magnet 142 and a fixing member 143 that embeds and fixes the magnet from four directions. By fixing the magnet 142 from four directions, the load applied to the magnet during operation can be reduced. The magnet 142 and the fixing member 143 are fixed with an adhesive or a mold.

  FIG. 16 shows a state in which the movable element 141 and the guide portion 157 come into contact with each other in this embodiment. FIG. 16 is a side view of the damper device 151 as viewed from the + Z direction with the damper device 151 removed. A contact member 158 of the guide portion 157 is provided to face the fixed member 143 that constitutes the mover 141. In FIG. 16, the contact member 158 shows an example of a roller guide provided with a rotatable roller, and is configured to slide in contact with the operation of the mover 141.

  In the above configuration, the contact member 158 in contact with the fixed member 143 can support vibration in the X direction and Y direction of the mover 141 that occurs when the mover 141 contacts the damper piston 155. As a result, the load applied to the magnet 142 can be reduced, and as a result, a highly reliable gas circuit breaker can be provided.

  In FIG. 16, an example of a roller guide is shown as the contact member 158 of the guide portion 157, but the Z-direction is movable in a configuration that slides in contact, such as a linear guide, a roller bearing, a cam follower, a thrust bearing, and the like. However, the present invention is not limited to this as long as vibration in the Y direction or the X direction can be suppressed.

  The material of the contact member 158 is preferably non-magnetic, for example, non-magnetic stainless alloy or aluminum alloy, but is not limited thereto.

  The present invention is not limited to the embodiment described above. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to the one having all the configurations described.

  In addition, a part of a configuration of an embodiment can be replaced with another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment.

  For example, although the case where the mover is formed in one stage has been described in the above embodiment, the mover may have a structure in which two or more stages are stacked in the Y direction.

In the above embodiment, the case where the fixed side electrode is fixed has been described. However, a so-called dual drive type gas circuit breaker in which the electrode facing the movable side electrode is relatively movable may be used. In the present embodiment, the gas section of the shut-off part and the operation part are separated, and the operation part is driven via the linear seal part 82. However, the same high pressure SF ₆ is used with the shut-off part and the operation part as the same gas compartment. It may be filled with gas. As shown in FIG. 1, when the gas section of the shut-off section and the operation section are separate sections, the shut-off section is filled with high-pressure SF ₆ gas, but the operation section case 110 of the operation section is sealed from the outside (atmosphere). There are cases where it is sealed and cases where it is not sealed.

  When the operation unit case 110 is sealed, the internal gas can be sealed by sandwiching a sealing member such as an O-ring between the flange mating surfaces of the operation unit case 110 and tightening the bolts. At this time, in FIG. 1, the linear seal portion 82 provided between the blocking portion and the operation portion is not necessary.

With the above configuration, the inside of the operation unit case 110 is filled with atmospheric dry air, nitrogen, and SF ₆ gas. When the operation unit is hermetically sealed, it is less susceptible to the influence of the external environment, and it is possible to provide a highly reliable operation unit because it is possible to eliminate factors that degrade performance such as humidity, rainwater, and insects. However, when sealed, every time the inside is inspected, the sealed operation unit case 110 must be opened to the atmosphere, and the inspection work becomes complicated. If priority is given to the ease of such internal inspection, the operation unit case 110 does not need to be sealed.

DESCRIPTION OF SYMBOLS 1 ... Blocking part case, 2 ... Insulation support spacer, 3 ... Fixed side electrode, 4 ... Movable side electrode, 5 ... Nozzle, 6 ... Movable electrode, 7 ... Insulation support cylinder, 8 ... High voltage conductor, 9 ... Mount, 51 DESCRIPTION OF SYMBOLS ... Current transformer, 81 ... Insulating rod, 82 ... Linear seal part, 100 ... Operation part, 110 ... Operation part case, 111 ... Stator unit support member, 112 ... Flange, 113 ... Bolt, 114 ... Cover, 115 ... Bolt , 130 ... Actuator, 131 ... Stator, 132 ... First magnetic pole part, 133 ... Second magnetic pole part, 134 ... Magnetic body, 135 ... Stator unit, 136 ... Winding, 137 ... Spacer, 138 ... Guide roller Unit 141 141 Movable element 142 Permanent magnet 143 Magnet fixing member 151 Damper device 152 Damper 153 Return spring 154 Damper device case 155 Damper piston, 156 ... bolt, 157 ... guide portion, 158 ... contact member, 159 ... holding member, 160 ... through hole, 161 ... power supply unit, 162 ... control unit, 163 ... sealing terminal, 164 ... bolt, 251 ... hydraulic damper 252 ... Cylinder, 253 ... Returning coil spring, 254 ... Damper piston, 255 ... Opening, 261 ... Pneumatic damper device, 262 ... Cylinder, 263 ... Returning coil spring, 264 ... Damper piston, 265 ... Opening, 271 ... Mover end flange

Claims (5)

A blocking portion having a pair of contacts provided facing each other in a blocking portion case filled with an insulating gas;
A mover that is arranged on the same axis as the operation axis of the contactor while being alternately reversed with a magnetic pole of a permanent magnet or a magnetic body, and is configured integrally with a fixed member,
A gas circuit breaker having an operation unit in an operation unit case, the operation unit having a stator having a plurality of magnetic poles arranged opposite to the mover and having windings,
A damper device case is provided on the operation axis of the mover and on the opposite end of the operation unit case to the blocking unit case,
A guide portion that guides the movable element is sandwiched between the damper device case and an end surface of the operation section case, and is fastened together with a bolt that is fastened on an axis parallel to the operation axis of the movable element. Gas circuit breaker. In claim 1,
The guide portion includes a contact member that guides an end portion of the mover far from the blocking portion to a damper device, and a holding member for the contact member. The holding member is a damper device case and the operation portion case. A gas circuit breaker that is sandwiched between the end face of the gas. In claim 2,
The gas circuit breaker characterized in that the contact member is a buffer material. In claim 2,
The gas circuit breaker according to claim 1, wherein the contact member includes a roller. In claim 2,
The gas circuit breaker according to claim 1, wherein the contact member is provided so as to contact a fixed member of the movable element.