JP2019032994A - Vacuum switching device - Google Patents

Abstract

To provide means of preventing buckling of a cutoff spring without increasing a movable part weight.SOLUTION: In a vacuum switching device, a cutoff spring in which a switch changer and an actuator performing an open and close operation of the switch changer is arranged on a straight line, and the switch changer comprises a wipe applying a contact force to a switch change electrode in an input state; and a cutoff spring that opens a pole of the switch changer. One end of the wipe spring and the cutoff spring is contacted to a common first movable spring receiver, the first movable spring receiver is mechanically connected to the actuator, the other end of the wipe spring is contacted to a second movable spring receiver and the second movable spring receiver is mechanically connected to the switch changer. The other end of the cutoff spring is contacted to a fixed spring receiver. The wipe spring is arranged to an inner side of the cutoff spring in a nest state, and the second movable spring receiver includes a state of being positioned at an axial direction outer region nipped by the first movable spring receiver and the fixed spring receiver in accordance with a switching operation of the switch changer.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a vacuum switchgear, and more particularly, to a vacuum switchgear suitable for a switch and a controller in which an operator for opening / closing the switch is arranged on a straight line.

  A conventional vacuum switchgear, for example, a vacuum switchgear that constitutes a high-voltage passing cable branching unit mounted on a railway vehicle, has a switch and an actuator arranged on a straight line, but both are arranged on a straight line. The axial length was longer.

  As a vacuum switching device for improving this, for example, there is one described in Patent Document 1. The vacuum switchgear described in Patent Document 1 opens a spring wiper spring that applies contact force to a switch electrode in a closed state and an open / close switch electrode inside an electromagnetic switch that opens and closes the switch. Therefore, the axial length is shortened by nesting the shut-off spring.

  In the vacuum switchgear described in Patent Document 1, the wiper spring arranged in a nested manner and the one end of the cutoff spring are both received, the first movable spring receiver to which the attraction force of the electromagnet is transmitted, the wipe spring, and the like. A second movable spring receiver that is in contact with the end and mechanically connected to the movable side of the switch; and a fixed spring receiver that is in contact with the other end of the shut-off spring. The spring receiver is always located inside the fixed spring receiver.

Chinese Patent Application No. 10165524

  Generally, in order to reduce the energy loss of the breaking spring during the opening / closing operation of the switch, it is necessary to suppress the buckling of the breaking spring, and for this purpose, the guide having an outer diameter substantially equal to the inner diameter of the breaking spring is cut off. It is effective to arrange it inside the spring.

  In the vacuum switchgear described in Patent Document 1, the output shaft of the electromagnet that penetrates the inside of the cutoff spring has a stepped structure, and the diameter of the large diameter portion of the output shaft of the stepped structure is equal to the outer diameter of the wipe spring. Thus, buckling of the cutoff spring is prevented by guiding the inside of the cutoff spring continuously and mechanically.

  However, in order to prevent buckling of the cutoff spring in the vacuum switchgear described in Patent Document 1, it is necessary to provide a large diameter portion equal to the outer diameter of the wipe spring on the output shaft of the electromagnet, which increases the weight of the movable portion. There was a risk of inviting.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a vacuum switchgear that can prevent buckling of a cutoff spring without increasing the weight of a movable part.

  In order to achieve the above object, the vacuum switchgear according to the present invention has a switch and an operating unit for performing the opening / closing operation of the switch arranged in a straight line, and the switch contacts the switch electrode in the on state. A wipe spring for applying a force and a cutoff spring for opening the switch electrode, and one end of the wipe spring and the cutoff spring is in contact with a common first movable spring receiver, and the first movable spring receiver is The other end of the wipe spring abuts on a second movable spring receiver, and the second movable spring receiver is mechanically connected to the switch, The other end is a vacuum switching device configured to contact a fixed spring receiver, wherein the wipe spring is nested inside the shut-off spring, and the second switch is opened and closed with the opening / closing operation of the switch. The movable spring receiver includes the first movable spring receiver and It characterized by having a state that is located outside the axial region between the serial fixed spring bearing.

  According to the present invention, buckling of the cutoff spring can be prevented without increasing the weight of the movable part.

It is a figure which shows the example of the vehicle organization in the rail vehicle by which the vacuum switchgear of this invention is employ | adopted. FIG. 2 is an electric circuit diagram in the railway vehicle organization shown in FIG. 1. It is a figure which shows the arrangement configuration of the unit switch which is a switch employ | adopted as Example 1 of the vacuum switchgear of this invention. It is a figure which shows the state which connected the T-shaped cable head to the unit switch shown in FIG. It is a figure which shows the structure which accommodated the unit switch shown in FIG. 4 in a case, and applied an uneven load to the electrical connection part. FIG. 4 is a side view of FIG. 3. It is a figure which shows the outfitting state which attached the cable to Example 1 of the vacuum switchgear of this invention installed on the roof of a vehicle, and accommodated this in the exterior case. FIG. 2 is a diagram illustrating a first embodiment of the vacuum switching device according to the present invention and illustrating a positional relationship between a wipe spring and a cutoff spring in a cutoff state of a vacuum interrupter. FIG. 5 is a diagram illustrating a first embodiment of the vacuum switching device according to the present invention and illustrating a positional relationship between a wipe spring and a cutoff spring in a state where a vacuum interrupter is turned on. FIG. 7 is a diagram illustrating a positional relationship between a wipe spring and a cutoff spring in a cutoff state of a vacuum interrupter according to a second embodiment of the vacuum switching device of the present invention. FIG. 9 is a diagram illustrating a positional relationship between a wipe spring and a cutoff spring in a state in which a vacuum interrupter is turned on according to a second embodiment of the vacuum switching device of the present invention. It is Example 3 of the vacuum switching device of this invention, and is a figure which shows the positional relationship of the wipe spring and interruption | blocking spring in the injection | throwing-in state of a vacuum interrupter. FIG. 9 is a diagram illustrating a positional relationship between a wipe spring and a cutoff spring in a vacuum interrupter cutoff state according to a fourth embodiment of the vacuum switching device of the present invention. FIG. 9 is a diagram illustrating a positional relationship between a wipe spring and a cutoff spring in a state in which a vacuum interrupter is turned on according to a fourth embodiment of the vacuum switching device of the present invention. FIG. 10 is a diagram illustrating a positional relationship between a wipe spring and a cutoff spring in a cutoff state of a vacuum interrupter according to a fifth embodiment of the vacuum switching device of the present invention.

  The vacuum switchgear according to the present invention will be described below based on the illustrated embodiments. In addition, in each Example, the same code | symbol is used for the same component.

  FIG. 1 shows an example of vehicle organization in a railway vehicle in which the vacuum switchgear according to the present invention is employed.

  As shown in the figure, the railway vehicle 25 in the present embodiment is composed of 8 cars of 1stCar, 2ndCar, 3rdCar, 4thCar, 5thCar, 6thCar, 7thCar, and 8thCar.

  On the roof of the vehicle, high-voltage passing cables RC1, RC2, RC3, RC4, and RC5 are arranged. These high-pressure passing cables RC1, RC2, RC3, RC4, and RC5 are linear joints SJ1, SJ2, SJ3. , SJ4 connects between the vehicles, and branches at T-branch joints TJ1 and TJ2 in the direction below the floor of the vehicle.

  Further, the pantographs PG1 and PG2 are connected to the high-voltage passing cables RC3 and RC5, and receive power from a feeder (not shown).

  FIG. 2 shows an electric circuit in the vehicle organization of the railway vehicle shown in FIG.

  As shown in the figure, the high-voltage passing cable RC1 is directly connected to the primary side of the power receiving VCB1 provided under the floor of the vehicle, and the secondary side of the power receiving vacuum circuit breaker VCB1 is connected to the main transformer Tr1. The secondary winding of the main transformer TR1 supplies power to the motor, and the tertiary winding supplies power to the auxiliary devices. Similarly, the high-voltage lead-in cable branched by the T-branch unit TJ1 is connected to the primary side of the power receiving vacuum circuit breaker VCB2 provided under the floor of the vehicle, and the secondary side of the power receiving VCB2 is connected to the main transformer Tr2. The secondary winding of the main transformer TR2 supplies power to the electric motor, and the tertiary winding supplies power to the auxiliary devices. Similarly, the high-voltage lead-in cable branched by the T branch unit TJ2 is connected to the primary side of the power receiving vacuum circuit breaker VCB3 provided under the floor of the vehicle, and the secondary side of the power receiving VCB3 is connected to the main transformer Tr3. The secondary winding of the main transformer TR3 supplies power to the motor, and the tertiary winding supplies power to the auxiliary devices.

  As shown in FIG. 2, the power receiving vacuum circuit breakers VCB1, VCB2, and VCB3 and the main transformers Tr1, Tr2, and Tr3 are arranged under the floor of the vehicle, and the other electric devices shown in FIG. (Cables RC1, RC2, RC3, RC4, RC5, linear joints SJ1, SJ2, SJ3, SJ4, pantographs PG1, PG2, T-branch joints TJ1, TJ2) are arranged on the roof of the vehicle.

  By the way, since it is not convenient for the worker to climb on the roof of the vehicle, it is preferable that the worker can work without climbing on the roof of the vehicle as much as possible. Further, when an electric device is arranged on the roof of the vehicle, it is desired that the space on the roof of the vehicle is particularly limited in the height direction and the height of the electric device can be reduced.

  For example, in the electric circuit shown in FIG. 2, when a ground fault occurs at the position indicated by “Fault”, the linear joint SJ2 is automatically opened by an external command, so that only the main transformer Tr1 is provided. It becomes possible to continue operation by disconnecting. Specifically, the movable electrode 5 in the unit switch described below is operated.

  In this embodiment, the case where a ground fault has occurred at the position indicated by “Fault” in FIG. 2 is described as an example. Therefore, only the straight joint SJ2 disconnects the circuit in order to prevent the accident from spreading. Needless to say, the linear joint for disconnection changes depending on the location of the ground fault.

  By setting it as such a structure, the high voltage cable including a malfunction location and a healthy high voltage cable can be automatically isolate | separated, without an operator climbing on the roof of a vehicle.

  FIG. 3 shows details of the unit switches (T-branch joints TJ1, TJ2) that are switches used in the vacuum switchgear according to the present embodiment.

  The unit switch (T-branch joint TJ1, TJ2) shown in the figure covers the fixed electrode 3, the movable electrode 5 that contacts or separates from the fixed electrode 3, and the periphery of the fixed electrode 3 and the movable electrode 5. An arc shield 6, a cylindrical ceramic insulating cylinder 7 A and 7 B that supports the arc shield 6 and constitutes an outer container of the vacuum interrupter 1, and a vacuum interrupter 1 that includes a bellows 2 and the like are provided.

  The outer container of the vacuum interrupter 1 described above is configured by covering both ends of the ceramic insulating cylinders 7A and 7B with end plates, and maintains the inside in a vacuum state. The fixed electrode 3 is connected to a fixed conductor 3 a, and the fixed conductor 3 a is drawn out of the vacuum interrupter 1. On the other hand, the movable electrode 5 is connected to the movable conductor 5 a, and the movable conductor 5 a is drawn out of the vacuum interrupter 1. The above-described bellows 2 is disposed between the movable conductor 5a and the movable end plate so that the movable conductor 5a can be moved while the vacuum state of the vacuum interrupter 1 is maintained.

  Further, the unit switch is formed by molding the bushing conductor 9A connected to the fixed conductor 3a and the bushing conductors 9B and 9C connected to the movable conductor 5a with a solid insulator 11 such as epoxy resin, so that the vacuum interrupter 1 is movable. On the side, an air-insulating operating rod 10 for driving the movable electrode 5 of the vacuum interrupter 1 so as to be in contact with and away from the fixed electrode 3 is provided.

  The above-described solid insulator 11 covers the vacuum interrupter 1 and the bushing conductors 9A, 9B, and 9C in close contact with each other and covers the periphery of the air-insulating operation rod 10. The space around the air-insulating operating rod 10 is sealed with a solid insulator 11 and sealing means, and an insulating gas such as dry air or SF6 gas is sealed inside. A linear seal or bellows is applied as the sealing means.

  The air-insulating operating rod 10 is connected to an electromagnetic operating device 12, and the electromagnetic operating device 12 is arranged on a substantially straight line with the vacuum interrupter 1. In addition, 8A, 8B, and 8C are electrical connection parts.

  Next, FIG. 4 shows a state in which the T-type cable heads 13A, 13B, and 13C are connected to the unit switches (T-branch joints TJ1 and TJ2) shown in FIG.

  As shown in FIG. 4, the vacuum interrupter 1 is arranged substantially linearly with the electromagnetic actuator 12, and is connected to the bushing conductor 9 </ b> A connected to the fixed conductor 3 a on the fixed electrode 3 side via the electrical connection portion 8 </ b> A. The T-shaped cable head 13A is connected so as to be arranged upward in FIG. 4, and the bushing conductors 9B and 9C connected to the movable conductor 5a on the movable electrode 5 side are connected to the T-shaped cable via the electrical connection portions 8B and 8C. The heads 13B and 13C are connected so as to be arranged in the left-right direction in FIG. 14A, 14B, and 14C are insulating plugs.

  With this arrangement, the electromagnetic operating device 12 and the cables extending from the T-shaped cable heads 13B and 13C do not interfere with each other, so that the entire width can be reduced.

  Although detailed description is omitted, the electromagnetic operating device 12 generates a driving force by, for example, combining a permanent magnet and an electromagnet with a spring and switching energization to a coil constituting the electromagnet ON / OFF.

  Next, FIG. 5 shows a configuration in which the unit switches (T-branch joints TJ1, TJ2) shown in FIG. 4 are housed in the outer case 17 so that an unbalanced load is not applied to the electrical connection portions 8A, 8B, 8C. Indicates.

  As shown in the figure, cables 15A, 15B, and 15C extending from the T-shaped cable heads 13A, 13B, and 13C are mechanically held by an outer case 17 to form a branch joint, and the electrical connection portions 8A, 8B, The load is not applied to 8C.

  Here, the cable 15B is routed forward (downward in the figure) of the railway vehicle, the cable 15A is routed rearward (upward in the figure), and the cable 15C is connected to the main transformer under the floor.

  In such a configuration, to ensure safety, the roof of the vehicle is grounded, and the surfaces of the T-shaped cable heads 13A, 13B, 13C and the unit switches (T branch joints TJ1, TJ2) are grounded. It has become.

  In general, the roof of the vehicle is grounded from the viewpoint of ensuring the safety of the worker. However, as described above, there is a great restriction on the height of the electric devices arranged on the roof of the vehicle.

  On the other hand, according to the configuration shown in FIG. 5, since the surfaces of the T-shaped cable heads 13A, 13B, and 13C and the unit switches (T-branch joints TJ1 and TJ2) are at ground potential, the roof of the vehicle It is not necessary to secure an insulation distance between the two and the height can be reduced. More specifically, the branch unit can be disposed on the roof substantially in parallel with the roof.

  Further, the bushing conductors 9B and 9C are arranged in a direction substantially perpendicular to the movable direction of the movable electrode 5 to prevent the size of the bushing conductors 9B and 9C from increasing in the movable direction.

  In the configuration shown in FIG. 5, the bushing conductors 9B and 9C are arranged in a direction substantially perpendicular to the movable direction of the movable electrode 5. However, the bushing conductors 9B and 9C are provided at least in a direction different from the movable direction of the movable electrode 5. If so, a certain effect can be expected.

  Further, as shown in FIG. 6, the unit switches (T branch joints TJ1, TJ2) are fixed to the base 18 by stays 19A, 19B, 19C, and the base 18 is fixed to the railway vehicle.

  FIG. 7 shows an outfitting state in which the cables 15A and 15B are attached to the above-described vacuum switchgear installed on the roof 16 of the vehicle and stored in the exterior case 17.

  Next, FIG. 8 and FIG. 9 show that the vacuum interrupter 1 in the vacuum switchgear according to the present embodiment is in a cut-off state (the fixed electrode 3 and the movable electrode 5 are in a separated state) and in a put state (the fixed electrode 3 and the movable electrode 5 are in contact) FIG. 8 shows details of a wipe spring 20 that applies a contact force to the movable electrode 5 and a blocking spring 21 that opens the movable electrode 5 (A portion in FIG. 8 corresponds to A portion in FIG. 3). 8 shows a shut-off state of the vacuum interrupter 1, and FIG. 9 shows a put-on state of the vacuum interrupter 1.

  As shown in FIGS. 8 and 9, the vacuum switching device of the present embodiment includes a vacuum interrupter 1 and an electromagnetic operating device 12 that opens and closes the vacuum interrupter 1. 20 is nested inside the shut-off spring 21.

  One end (on the side of the electromagnetic actuator 12) of the wipe spring 20 and the cutoff spring 21 abuts on a common first movable spring receiver 22, and this first movable spring receiver 22 is mechanically connected to the electromagnetic actuator 12. The other end (vacuum interrupter 1 side) of the wipe spring 20 is in contact with the second movable spring receiver 23, and the second movable spring receiver 23 is mechanically connected to the vacuum interrupter 1 and cut off. The other end (vacuum interrupter 1 side) of the spring 21 is configured to abut against the fixed spring receiver 24, and the second movable spring receiver 23 is connected to the first movable spring in accordance with the opening / closing operation of the vacuum interrupter 1. It has the state located outside the axial direction area | region (range of L of FIG. 9) pinched | interposed by the receiver 22 and the fixed spring receiver 24. FIG.

  Specifically, when the vacuum interrupter 1 is in the shut-off state (the state shown in FIG. 8), the second movable spring receiver 23 is located slightly inside (on the electromagnetic actuator 12 side) from the fixed spring receiver 24. In the closing state (the state shown in FIG. 9), the second movable spring receiver 23 is located outside the fixed spring receiver 24 (on the non-operator side = vacuum interrupter 1 side).

  By adopting such a configuration of the present embodiment, the wipe spring 20 is nested inside the shut-off spring 21 during the opening / closing operation of the vacuum interrupter 1, so that the outer peripheral surface of the wipe spring 20 is shut off. Since the inner peripheral surface of the spring 21 is guided, it is not necessary to provide a guide for preventing buckling, so that the weight of the movable portion does not increase, and the second movable spring receiver 23 is the first movable spring receiver. 22 and the fixed spring receiver 24, the entire state (from end to end) of the blocking spring 21 is guided by the wipe spring 20. Therefore, buckling of the cutoff spring 21 is suppressed, and as a result, energy loss of the cutoff spring 21 is reduced.

  Further, since the wipe spring 20 has a spring shape and is lighter in weight than the solid shaft having the same outer diameter, the wipe spring 20 is compared with the case where the inner peripheral surface of the blocking spring 21 is guided by the outer peripheral surface of the solid shaft. An increase in the weight of the movable part can be suppressed.

  Further, in this embodiment, the winding direction of the wire of the wipe spring 20 and the cutoff spring 21 is reversed (for example, the wire of the wipe spring 20 is clockwise and the wire of the cutoff spring 21 is counterclockwise). The strands of the wipe spring 20 and the cutoff spring 21 do not mesh with each other, and a smooth guide action can be realized.

  Furthermore, in this embodiment, since the tightening condition of the screw in the vicinity of the second movable spring receiver 23 can be visually inspected in the inserted state of FIG. 9, there is an effect that the reliability is high.

  Therefore, according to the present embodiment, the cutoff spring 21 and the wipe spring 20 are nested so that the axial length is shortened, and the inside of the cutoff spring 21 is wiped without increasing the weight of the movable part. By guiding at 20, the buckling of the cutoff spring 21 can be prevented, and the energy loss during the cutoff operation can be reduced.

  Embodiment 2 of the vacuum switchgear according to the present invention will be described with reference to FIGS. 10 shows a shut-off state of the vacuum interrupter 1, and FIG. 11 shows a put-on state of the vacuum interrupter 1.

  The configuration of the present embodiment shown in the figure is substantially the same as that of the first embodiment. However, in this embodiment, the winding directions of the wire of the wipe spring 20 and the cutoff spring 21 are the same, and the wipe spring 20 The wire of the cutoff spring 21 is wound tightly (the wire of the wipe spring 20 may be wound tightly and the wire of the cutoff spring 21 may be wound roughly) .

  Also in this embodiment, if the winding pitch of the wipe spring 20 is appropriately selected (the wire of the wipe spring 20 is roughly wound and the wire of the cutoff spring 21 is tightly wound), the same as in the first embodiment. An effect can be obtained. Moreover, since the winding direction of the wire of the wipe spring 20 and the cutoff spring 21 is the same, there exists an effect that the penetration shaft inside a spring and a screw fastening part can be easily visually confirmed from the outside.

  Embodiment 3 of the vacuum switchgear according to the present invention will be described with reference to FIG. FIG. 12 shows a state in which the vacuum interrupter 1 is turned on.

  The configuration of the present embodiment shown in the figure is substantially the same as that of the first embodiment. However, in this embodiment, the portion of the first movable spring receiver 22 that contacts the wipe spring 20 is made thick so that the wipe is performed. The overall length of the spring 20 is shortened.

  That is, in this embodiment, the portion of the first movable spring receiver 22 that contacts the wipe spring 20 is protruded in the axial direction to form a convex portion 22a, and the radial thickness of the convex portion 22a is set to It is the same as the outer diameter.

  In this embodiment, the same guide effect as in the first embodiment and the effect of visually checking the tightening condition of the screw in the vicinity of the second movable spring receiver 23 can be obtained while the thickness of the first movable spring receiver 22 is increased. Since it is not necessary to arrange the wipe spring 20, the entire length of the wipe spring 20 can be shortened, so that the selection range of the entire length of the wipe spring 20 can be expanded.

  Embodiment 4 of the vacuum switchgear according to the present invention will be described with reference to FIGS. 13 shows a shut-off state of the vacuum interrupter 1, and FIG. 14 shows a put-on state of the vacuum interrupter 1.

  The configuration of the present embodiment shown in the figure is substantially the same as that of the first embodiment, but in this embodiment, the second movable spring receiver 23 is sandwiched between the first movable spring receiver 22 and the fixed spring receiver 24. It is always located outside the axial direction region (the range of L in FIGS. 13 and 14) (even in the shut-off state and the input state).

  That is, in the present embodiment, the second movable spring receiver 23 is connected to the first movable spring receiver 22 and the fixed spring receiver in the shut-off state (the state shown in FIG. 13) and the closing state (the state shown in FIG. 14) of the vacuum interrupter 1. Outside the axial region sandwiched by 24 (range L in FIGS. 13 and 14), it is always located closer to the vacuum interrupter 1 side than the fixed spring receiver 24.

  In this embodiment as well, the same effects as those of the first embodiment can be obtained, and the screw tightening condition in the vicinity of the second movable spring receiver 23 can be visually observed not only in the closed state of the vacuum interrupter 1 but also in the shut-off state. Further, the reliability is improved.

  Embodiment 5 of the vacuum switchgear according to the present invention will be described with reference to FIG. FIG. 15 shows a shut-off state of the vacuum interrupter 1.

  The configuration of the present embodiment shown in the figure is substantially the same as that of the first embodiment, but in this embodiment, two wipe springs are used, one wipe spring 20 is on the inner side, and the wipe spring 20A is disposed on the outer side. In addition to being arranged in a nested manner, the two wipe springs 20 and 20A in the nested manner are arranged on the inner side, and a blocking spring 21 is arranged on the outer side thereof in a nested manner.

  In this embodiment as well, the surging characteristics of the wipe spring can be changed by combining the two wipe springs 20 and 20A having different outer diameters while obtaining the same effect as in the first embodiment.

  The above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Vacuum interrupter, 2 ... Bellows, 3 ... Fixed electrode, 3a ... Fixed conductor, 5 ... Movable electrode, 5a ... Movable conductor, 6 ... Arc shield, 7A, 7B ... Ceramic insulation cylinder, 8A, 8B, 8C ... Electrical connection 9A, 9B, 9C ... bushing conductor, 10 ... air insulation operating rod, 11 ... solid insulation, 12 ... electromagnetic actuator, 13A, 13B, 13C ... T type cable head, 14A, 14B, 14C ... insulation plug 15A, 15B, 15C ... Cable, 16 ... Roof, 17 ... Exterior case, 18 ... Base, 19A, 19B, 19C ... Stay, 20, 20A ... Wipe spring, 21 ... Shut-off spring, 22 ... First movable spring receiver 22a, a convex portion of the first movable spring receiver, 23, a second movable spring receiver, 24, a fixed spring receiver, 25, a railway vehicle.

Claims (9)

A wiper spring that provides a contact force to the switch electrode when the switch and a switch that opens and closes the switch are arranged on a straight line, and the switch is turned on, and a breaking spring that opens the switch electrode With
One end of the wipe spring and the cutoff spring is in contact with a common first movable spring receiver, the first movable spring receiver is mechanically connected to the operating device, and the other end of the wipe spring is a second one. The second movable spring receiver is mechanically connected to the switch, and the other end of the cutoff spring is in contact with the fixed spring receiver,
The wipe spring is nested inside the shut-off spring, and the second movable spring receiver is formed by the first movable spring receiver and the fixed spring receiver in accordance with the opening / closing operation of the switch. A vacuum switchgear characterized by having a state of being located outside an axial region sandwiched. The vacuum switchgear according to claim 1,
Along with the opening / closing operation of the switch, the second movable spring receiver is located closer to the switch than the fixed spring receiver outside the axial region sandwiched between the first movable spring receiver and the fixed spring receiver. A vacuum switchgear characterized by having a positioned state. The vacuum switchgear according to claim 2,
In the shut-off state of the switch, the second movable spring receiver is positioned on the inner side of the fixed spring receiver. In the open state of the switch, the second movable spring receiver is on the outer side of the fixed spring receiver. The vacuum switchgear characterized by being located in. The vacuum switchgear according to claim 1,
In accordance with the opening / closing operation of the switch, the second movable spring receiver is always located outside the axial region sandwiched between the first movable spring receiver and the fixed spring receiver. Switchgear. The vacuum switchgear according to claim 4,
In the shut-off state and the closing state of the switch, the second movable spring receiver is located closer to the switch than the fixed spring receiver outside the axial region sandwiched between the first movable spring receiver and the fixed spring receiver. A vacuum switchgear characterized in that it is always located. The vacuum switchgear according to any one of claims 1 to 5,
2. A vacuum switchgear according to claim 1, wherein the wire winding direction of the wipe spring and the shut-off spring is reverse. The vacuum switchgear according to any one of claims 1 to 5,
The winding direction of the wire of the wipe spring and the cutoff spring is the same, and either one of the wire of the wipe spring or the cutoff spring is roughly wound and the other is densely wound. Features a vacuum switchgear. The vacuum switchgear according to any one of claims 1 to 7,
A portion of the first movable spring receiver that is in contact with the wipe spring is protruded in the axial direction to form a convex portion, and the radial thickness of the convex portion is approximately the same as the outer diameter of the wipe spring. A vacuum switchgear characterized by. The vacuum switchgear according to any one of claims 1 to 8,
2. The vacuum opening / closing apparatus according to claim 1, wherein the wipe spring is constructed by nesting two wipe springs, and the two wipe springs nested are nested with the blocking spring.

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