JP2016100204A - Disconnector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a grounding fault phenomenon from a restriking arc from being caused by electrical discharge between electrodes without increasing the size of a disconnector.SOLUTION: A disconnector includes: a fixed conductor having an end part and a recessed part; a fixed shield fixed to the end part and having an end surface and a through hole; a movable conductor having one end, which may be inserted into the recessed part, and an outer peripheral surface; a movable shield having an end surface facing or contacting with the end surface of the fixed shield and an inner peripheral surface configured to engage with the outer peripheral surface of the movable conductor; a driving part which moves the movable conductor and the movable shield between a first state, in which the movable conductor and the movable shield face and separate from the fixed conductor and the fixed shield, and a second state, in which the one end of the movable conductor is inserted into and contacts with the recessed part of the fixed conductor and the end surface of the movable shield contacts with the end surface of the fixed shield; and a closed vessel housing the fixed conductor, the fixed shield, the movable conductor, and the movable shield.SELECTED DRAWING: Figure 1

Description

  The embodiment of the present invention relates to a disconnector in which a movable contact and a fixed contact are arranged in a sealed container so as to be connectable.

In recent years, an insulating gas such as SF6 gas is filled in a metal hermetic container, and the movable contact of the movable contact portion and the fixed contact of the fixed contact portion are arranged to face each other, so that the movable contact in an open state is provided. There has been proposed a gas-insulated disconnector in which a child and a stationary contact are connected to each other via a movable conductor of a movable contact portion that is movable by an operation mechanism to make a closed state.
In such a gas insulated disconnector, when the tip of the movable conductor (arc-proof electrode) approaches the fixed shield of the fixed contact portion, re-ignition occurs and a re-ignition arc is formed. And if the surface electric field of the formed re-arcing arc becomes high, there may be a ground fault in the metal sealed container, so an insulator is provided around the space between the fixed contact portion and the arc-proof electrode. Etc. have been proposed.

JP 2003-203543 A

  However, when an insulator is provided on the outer peripheral portion of the space between the fixed contact portion and the arc-proof electrode, there is a problem that the diameter of the sealed container becomes large and the entire disconnector must be enlarged.

  The present invention has been made to solve such a problem, and provides a disconnector capable of preventing a ground fault phenomenon from a re-ignition arc due to a discharge between electrodes without increasing the disconnector. With the goal.

  In order to solve the above-described problem, the disconnector of the present invention corresponds to a fixed conductor having an end portion and a concave portion disposed at the end portion, and fixed to the end portion, and corresponds to the end surface and the concave portion. A movable shield having a fixed shield having a through-hole disposed on the end surface of the lever, an end that faces or contacts the fixed conductor and can be inserted into the recess, and an outer peripheral surface; and an end surface of the fixed shield The movable conductor and the movable shield are opposed to the movable shield, the movable shield having an end surface facing or contacting the inner surface and an inner circumferential surface engaged with the outer circumferential surface of the movable conductor, and the fixed conductor and the fixed shield. Between the first state of the movable conductor and the second state in which one end of the movable conductor is inserted into contact with the concave portion of the fixed conductor and the end surface of the movable shield is in contact with the end surface of the fixed shield. The movable shield A drive unit for moving the said fixed conductor, a fixed shield, the movable conductor, characterized in that it comprises a closed container for accommodating a movable shield, the.

  According to the present invention, it is possible to prevent a ground fault phenomenon from a re-ignition arc due to an inter-electrode discharge without increasing the disconnector.

It is sectional drawing which shows schematic structure of the disconnector which concerns on this invention, and is a figure which shows the cross section in an opening position. It is sectional drawing which shows schematic structure of the disconnector which concerns on this invention, and is a figure which shows the cross section in a movable contact part operation | movement. It is sectional drawing which shows schematic structure of the disconnector which concerns on this invention, and is a figure which shows the cross section in a closed position. It is sectional drawing which shows schematic structure of the disconnecting device of Embodiment 1 of this invention, and the drive part of a disconnecting device, and is a figure which shows the cross section in an opening position. FIG. 5 is a cross-sectional view showing a schematic configuration of the disconnector of the first embodiment and a drive unit of the disconnector, and is a cross-sectional view taken along the line AA of FIG. 4. It is a sectional view showing the schematic structure of the disconnecting switch of Embodiment 1 and the drive part of the disconnecting switch similarly, and is a figure showing the section in operation of a movable contact part. It is a sectional view showing the schematic structure of the disconnecting switch of Embodiment 1 and the drive part of a disconnecting switch similarly, and is a figure showing the section in a closed position. It is sectional drawing which shows schematic structure of the disconnecting device of Embodiment 2 of this invention, and the drive part of a disconnecting device, and is a figure which shows the cross section in an opening position. FIG. 9 is a cross-sectional view showing a schematic configuration of a disconnector and a drive unit of the disconnector of Embodiment 2 in the same manner, and is a view showing a BB cross section of FIG. 8. FIG. 5 is a cross-sectional view showing the schematic configuration of the disconnector and the drive unit of the disconnector in Embodiment 2 and a cross-section during the operation of the movable contact portion. Similarly it is sectional drawing which shows schematic structure of the disconnecting device of Embodiment 2, and the drive part of a disconnecting device, and is a figure which shows the cross section in a closing position. It is sectional drawing which shows schematic structure of the disconnecting device of Embodiment 3 of this invention, and the drive part of a disconnecting device, and is a figure which shows the cross section in an opening position. It is a figure which shows C arrow of FIG. FIG. 6 is a cross-sectional view showing a schematic configuration of a disconnector and a drive unit of the disconnector in Embodiment 3 in the same manner, and a cross-section during the operation of the movable contact portion. It is a figure which shows C arrow of FIG. FIG. 8 is a cross-sectional view showing a schematic configuration of a disconnector and a drive unit of the disconnector in Embodiment 3 and a cross-section at a closed position. It is a figure which shows C arrow of FIG. It is sectional drawing which shows schematic structure of the disconnector of Embodiment 4 of this invention, and is a figure which shows the cross section in an opening position. Similarly, it is sectional drawing which shows schematic structure of the disconnector of Embodiment 4, and is a figure which shows the cross section in a closing position. It is sectional drawing which shows schematic structure of the disconnector of Embodiment 5 of this invention, and is a figure which shows the cross section in an opening position.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 are sectional views showing a schematic configuration of a disconnector 1 according to the present invention, in which FIG. 1 is an open position, FIG. 2 is a movable contact portion 4 during operation, and FIG. 3 is a closed position. FIG.

  As shown in FIGS. 1 to 3, this disconnector 1 is provided with a fixed contact portion 3 and a movable contact portion 4 in a cylindrical tank (sealed container) 2 filled with an insulating gas.

The fixed contact portion 3 includes a fixed conductor 10, a fixed side energizing contact 11, a fixed shield 12, and the like.
The movable contact portion 4 includes a terminal side conductor 20, a movable shield 21, a movable conductor 22, a movable side arc-resistant electrode 23, and the like.

  The fixed contact portion 3 and the movable contact portion 4 are arranged such that the movable conductor 22 and the movable shield 21 are separated from the fixed conductor 10 and the fixed shield 12 in the longitudinal direction of the disconnector 1 (the horizontal direction in FIGS. 1 to 3). In the first state facing each other (hereinafter referred to as “open state”), for example, they are provided facing each other at a distance L2 (movement distance). Note that L1 in FIG. 1 is a second state in which one end of the movable conductor 22 is inserted into contact with the concave portion 10b of the fixed conductor 10 and the end surface of the movable shield 21 is in contact with the end surface of the fixed shield 12 from this open state. (Hereinafter referred to as “closed state”) (travel distance).

  As the insulating gas, a single gas of sulfur hexafluoride gas, nitrogen gas, dry air, carbon dioxide and oxygen, or a mixed gas composed of any of these gases is used. The tank 2 is made of metal.

  The fixed conductor 10 is fixed to the tank 2 via an insulator, and is connected to a fixed side terminal (not shown) of the disconnector 1. In addition, this fixed side terminal (not shown) is arrange | positioned at the left end of the disconnector 1 in FIG. 1, for example. The fixed conductor 10 has an end 10a on the opposite side of the fixed terminal (for example, the right side of the fixed conductor 10 in FIG. 1).

  A concave portion 10b is disposed at the end portion 10a. In addition, a fixed-side arc-proof electrode 13 is disposed in the center of the recess 10 b so as to protrude in the longitudinal direction of the tank 2. The fixed-side arc-proof electrode 13 is formed such that the tip position is shorter than the position of the end surface 12 a of the fixed shield 12.

  The fixed-side energizing contact 11 is fixed to the inner peripheral surface of the recess 10b, and one end 11a is disposed so as to slightly protrude inward from the inner peripheral surface of the recess 10b. One end 11a of the fixed-side energizing contact 11 is disposed so as to contact the outer peripheral surface 22b of the movable conductor 22 inserted into the recess 10b.

  The fixed shield 12 is fixed so as to cover a part of the end portion 10a of the fixed conductor 10, and has an end surface 12a and a through hole 12b. The end surface 12a is disposed so as to cover the tip of the end portion 10a of the fixed conductor 10. The through hole 12 b is disposed on the end surface 12 a corresponding to the concave portion 10 b of the fixed conductor 10. The diameter of the through hole 12b is substantially equal to the inner diameter of the concave portion 10b of the fixed conductor 10.

  One end of the terminal side conductor 20 (not shown) is fixed to the tank 2 via an insulator, and is connected to a movable side terminal (not shown) of the disconnector 1. The movable terminal (not shown) is disposed on the right side of FIG. 1, for example. The terminal-side conductor 20 is formed in a hollow cylindrical shape, and has the other end 20a on the opposite side of the movable-side terminal (for example, the left side of the terminal-side conductor 20 in FIG. 1).

  Furthermore, an energizing contact 24 that contacts a cylindrical portion 21a (described later) of the movable shield 21 is disposed on the inner peripheral surface of the terminal-side conductor 20 on the end 20a side. The energizing contact 24 is always in contact with a later-described cylindrical portion 21 a of the movable shield 21.

  The movable shield 21 has a cylindrical portion 21a and a shield portion 21b. For example, the movable shield 21 is disposed so as to cover the end 20a of the terminal-side conductor 20 in the above-described open state. The movable shield 21 can be moved a distance L2 between the open state and the closed state by a drive unit described later.

  The cylindrical portion 21 a is formed of a hollow cylindrical conductor whose outer diameter is substantially equal to the inner diameter of the terminal-side conductor 20. The cylindrical portion 21 a has an inner peripheral surface that engages with an outer peripheral surface 22 b described later of the movable conductor 22 and an outer peripheral surface that engages with an inner peripheral surface of the terminal-side conductor 20.

The shield portion 21b has an end surface 21c and a through hole 12d having an inner diameter substantially equal to the cylindrical portion 21a at the center of the end surface 21c, and is fixed to the left end portion of the cylindrical portion 21a in FIG. .
The end surface 21c is disposed so as to face the end surface 12a of the fixed shield 12 in an open state or to contact in a closed state.

  Further, an energizing contact 25 that contacts an outer peripheral surface 22b (described later) of the movable conductor 22 is disposed on the inner peripheral surface of the movable shield 21 on the cylindrical portion 21a side. The energizing contact 25 is always in contact with the outer peripheral surface 22b of the movable conductor 22 (see FIGS. 1 to 3).

The movable conductor 22 is disposed so as to be movable facing the fixed conductor 10 and has an end face 22a and an outer peripheral face 22b.
The end face 22a is disposed so as to be insertable into the concave portion 10b of the fixed conductor 10 when moving in the left direction of FIG. 1 (that is, the fixed conductor 10 side). Moreover, the recessed part 22c which the fixed side arc-proof electrode 13 in the recessed part 10b can engage is arrange | positioned at the end surface 22a.

The outer peripheral surface 22b is configured with an outer diameter that is equal to or slightly smaller than the inner diameter of the concave portion 10b of the fixed conductor 10.
The movable-side arc-proof electrode 23 is formed in a disk shape having a hole having the same diameter as the inner diameter of the concave portion 22 c of the movable conductor 22, and is disposed on the end surface 22 a of the movable conductor 22.

The movable shield 21 and the movable conductor 22 can be moved in the longitudinal direction of the disconnector 1 (left and right direction in FIG. 1) by a drive unit (not shown).
The configuration of the drive unit will be described in detail with reference to FIG.

  As shown in FIG. 1, in the open state, the fixed shield 12, the movable shield 21, and the movable conductor 22 (movable-side arc-resistant electrode 23) can maintain a predetermined withstand voltage performance, that is, the distance L2. Are separated from each other.

  As shown in FIG. 2, during the movement operation from the open state to the closed state or from the closed state to the open state, the movable shield 21 and the movable conductor 22 are moved relative to each other at a relative speed by the drive unit. In the longitudinal direction (right or left in FIG. 2). At this time, the moving amount (distance L2) of the movable shield 21 is smaller than the moving amount (distance L1) of the movable conductor 22 (L2 <L1), and the moving speed V2 of the movable shield 21 is higher than the moving speed V1 of the movable conductor 22. Is also small (V2 <V1). That is, for example, when the movable shield 21 and the movable conductor 22 start moving simultaneously, the movable shield 21 moves the distance L2 in a predetermined time, and the movable conductor 22 also moves the distance L1 in this predetermined time. The position of the movable shield 21 is closer to the fixed shield 12 side than the open state during the movement operation to the closed state.

  As shown in FIG. 3, in the closed state, the fixed-side arc-proof electrode of the fixed contact portion 3 is formed in the recess 22 c formed at the center of the end surface 22 a of the movable conductor 22 and the movable-side arc-proof electrode 23. 13 is inserted, the movable conductor 22 is in contact with the fixed-side energizing contact 11 of the fixed contact portion 3, and the end surface 21c of the movable shield 21 is in a position in contact with the end surface 12a of the fixed shield 12.

  In addition, during the movement operation from the open state to the closed state or from the closed state to the open state as shown in FIG. 2, when the interelectrode voltage exceeds the insulation recovery voltage, the movable-side arc-proof electrode 23 and A re-ignition arc 5 is generated between the fixed shield 12 and the interelectrode discharge. However, since the fixed shield 12 and the movable shield 21 having the same potential approach while moving, the surface electric field of the movable side arc-resistant electrode 23 that becomes the starting point of the re-ignition arc is suppressed. The number of occurrences decreases. Further, when the re-ignition arc 5 is generated, the fixed shield 12 and the movable shield 21 are brought close to each other, so that the surface electric field of the re-ignition arc is suppressed and a ground fault to the tank 2 can be prevented. .

  In the closed position, the movable conductor 22 reliably contacts the fixed-side energizing contact 11 and can be energized. In the open state, the movable shield 21 and the movable conductor 22 and the fixed shield 12 are separated from each other at positions where predetermined withstand voltage performance can be maintained. During the moving operation of the movable contact portion 4, in this disconnector 1, the fixed shield 12 and the movable shield 21 are close to each other. Even if the re-ignition arc 5 is generated without increasing the size of the tank itself, it is possible to prevent a ground fault to the tank 2.

  In addition to this, for example, the drive unit can start the movement of the movable conductor 22 before the movement of the movable shield 21. In this case, for example, the moving speeds of the movable shield 21 and the movable conductor 22 can be the same. The movable shield 21 moves the distance (movement amount) L2, and the movable conductor 22 moves the distance (movement amount) L1, thereby reaching the position of the closed state from the open state. The surface electric field of the re-ignition arc 5 due to the discharge is suppressed, and even when the re-ignition arc 5 is generated, a ground fault to the tank 2 can be prevented.

(Embodiment 1)
4-7 is sectional drawing which shows schematic structure of the disconnecting device 1 and the drive part 30 of the disconnecting device 1 of Embodiment 1 of this invention, FIG. 4 is an opening position, FIG. 5 is AA of FIG. FIG. 6 is a cross-sectional view showing a cross-section, FIG. 6 is a cross-sectional view of the movable contact portion 4 during operation, and FIG. In addition, about the structure similar to FIGS. 1-3, the same code | symbol is attached. The same applies to the following drawings.

  As shown in FIGS. 4 to 7, the movable conductor 22 has a recess 22 e on the opposite side to the end surface 22 a, for example, the right end surface 22 d in FIG. 4. The drive unit 30 is disposed in the recess 22e. The drive unit 30 includes a first rotating gear 31, a second rotating gear 32, a first linear gear 33, and a second linear gear 34.

  The first rotating gear 31 and the second rotating gear 32 have different diameters and are arranged concentrically with the same rotation center point. The first and second rotary gears 31 and 32 are rotatably connected to a motor 36 outside the disconnector 1 via the same rotary shaft 35 (see FIG. 5). The rotating shaft 35 passes through the tank 2, the terminal-side conductor 20, and the movable conductor 22. In FIG. 5, the tank 2 is omitted.

  The first linear gear 33 is fixed to the recess 22e of the movable conductor 22 along the longitudinal direction of the disconnector 1, that is, the left-right direction in FIG. The first rotating gear 31 is engaged with the first linear gear 33 in the recess 22e.

  The movable conductor 22 has a long groove 22 f disposed along the longitudinal direction of the disconnector 1. The long groove 22f opens to the movable terminal side. The second linear gear 34 is fixed to the movable shield 21 (cylindrical portion 21 a) along the longitudinal direction of the disconnector 1, and protrudes into the recess 22 e through the long groove 22 f of the movable conductor 22. The second rotating gear 32 is engaged with the second linear gear 34 in the recess 22e.

  Thereby, the first linear gear 33 can convert the rotational motion of the first rotating gear 31 into the linear motion of the movable conductor 22. Further, the second linear gear 34 can convert the rotational motion of the second rotary gear 32 into the linear motion of the movable shield 21.

  The first and second rotating gears 31 and 32 have a relationship of pitch diameters D1 and D2 of D1> D2. The ratio between the pitch diameters D1 and D2 is equal to the ratio between the moving amounts L1 and L2 of the movable conductor 22 and the movable shield 21. That is, the relationship is D1: D2 = L1: L2.

  That is, as shown in FIGS. 4 and 5, in the open state, the motor 36 allows the fixed shield 12, the movable shield 21, and the movable conductor 22 (movable side arc-resistant electrode 23) to maintain a predetermined withstand voltage performance. Are separated from each other by a distance L2.

  As shown in FIG. 6, during the movement operation from the open state to the closed state or from the closed state to the open state, the drive unit 30 causes the movable shield 21 and the movable conductor 22 to move at a relative speed with each other. 1 moves in the longitudinal direction, that is, in the right or left direction in the figure. At this time, the moving amount (distance L2) of the movable shield 21 is smaller than the moving amount (distance L1) of the movable conductor 22 (L2 <L1), and the moving speed V2 of the movable shield 21 is higher than the moving speed V1 of the movable conductor 22. Also, the pitch diameters D1 and D2 of the first and second rotary gears 31 and 32 are set so as to have a small (V2 <V1) relationship.

  That is, for example, when the movable shield 21 and the movable conductor 22 start moving simultaneously, the movable shield 21 moves the distance L2 by the second rotating gear 32, the second linear gear 34, and the motor 36 in a predetermined time. On the other hand, the movable conductor 22 and the movable-side arc-proof electrode 23 are moved by the first rotating gear 31, the first linear gear 33, and the motor 36 over the distance L1 in this predetermined time. The position of the movable shield 21 is closer to the fixed shield 12 side than the open state during the movement operation to the closed state.

  As shown in FIG. 7, in the closed state, the movable conductor 22 and the movable-side arc-proof electrode 23 end the movement of the distance L1. As a result, the fixed-side arc-proof electrode 13 of the fixed contact portion 3 is inserted into the concave portion 22 c formed at the center portion of the end surface 22 a of the movable conductor 22, and the movable conductor 22 is fixed to the fixed-side conductive contact 11 of the fixed contact portion 3. To touch.

  Similarly, the movable shield 21 ends the movement of the distance L2. As a result, the end surface 21 c of the movable shield 21 contacts the end surface 12 a of the fixed shield 12.

  As described above, in this embodiment, the moving speed of the movable shield 21 and the movable conductor 22 can be controlled by one motor 36, for example, can be moved to the distances L2 and L1 at the same time. The surface electric field of the ignition arc 5 is suppressed, and even if this re-ignition arc occurs, a ground fault to the tank 2 can be prevented, and an economical and highly reliable disconnector can be provided.

  In this embodiment, the first and second rotary gears 31 and 32 are connected to the same motor 36 via the same rotary shaft 35. However, the present invention is not limited to this, for example, via different rotary shafts. It is also possible to connect different motors separately. However, in this case, similarly to this embodiment, the moving speeds of the movable shield 21 and the movable conductor 22 are controlled to move to the distances L2 and L1 at the same time. It is also possible to start before moving. In this case, the pitch diameters D1 and D2 of the first and second rotating gears 31 and 32 may be equal or different.

  Further, as shown in FIG. 7, in the closed state, the fixed-side arc-proof electrode of the fixed contact portion 3 is formed in the recess 22 c formed at the center of the end surface 22 a of the movable conductor 22 and the movable-side arc-proof electrode 23. 13 is inserted, the movable conductor 22 is in contact with the fixed-side energizing contact 11 of the fixed contact portion 3, and the end surface 21c of the movable shield 21 is in a position in contact with the end surface 12a of the fixed shield 12.

At this time, since the outer peripheral surface 22b of the movable shield 21 is at a distance from the end surface 22a of the movable conductor 22, the surface electric field is increased and there is a possibility that dielectric breakdown may occur.
Therefore, by performing electron emission suppression processing such as anodizing, for example, on the outer periphery of the cylindrical portion 21a of the movable shield 21 and the outer peripheral surface 22b of the movable conductor 22, electron emission from the high voltage electrode such as the movable shield 21 is suppressed. It is also possible to prevent dielectric breakdown.

(Embodiment 2)
8-11 is sectional drawing which shows schematic structure of the disconnecting device 1 and the drive part 30 of the disconnecting device 1 of Embodiment 2 of this invention, FIG. 8 is an opening position, FIG. 9 is BB of FIG. FIG. 10 is a cross-sectional view, FIG. 10 is a view showing a cross-section at the closed position, and FIG.

  As shown in FIGS. 8 to 11, the drive unit 30 includes a first rotating gear 31, a second rotating gear 32, a first linear gear 33, and a second linear gear 34, as in the first embodiment. .

  The difference from the first embodiment is that the pitch diameters of the first rotating gear 31 and the second rotating gear 32 and the center points of the mutual rotation are arranged eccentrically. The first rotating gear 31 is connected to a motor 38 outside the disconnector 1 via a rotating shaft 37 so as to be rotatable. The second rotating gear 32 is rotatably connected to a motor 36 outside the disconnector 1 via a rotating shaft 35. One end of the rotating shaft 35 and the rotating shaft 37 face each other, and penetrate the tank 2, the terminal-side conductor 20 and the movable conductor 22 separately. In FIG. 9, the tank 2 is omitted.

  Further, the first and second rotating gears 31 and 32 have a pitch diameter D1 and D2 in a relationship of D1> D2. The ratio between the pitch diameters D1 and D2 is equal to the ratio between the moving amounts L1 and L2 of the movable conductor 22 and the movable shield 21. That is, the relationship is D1: D2 = L1: L2.

That is, as shown in FIGS. 8 and 9, in the open state, the motor 36 is separated from the fixed shield 12 and the movable shield 21 at positions where the predetermined withstand voltage performance can be maintained, that is, at a distance L2. Yes.
Further, the motor 38 is separated from the fixed shield 12 and the movable conductor 22 (movable side arc-proof electrode 23) at positions where the predetermined withstand voltage performance can be maintained, that is, at a distance L1.

  As shown in FIG. 10, during the movement operation from the open state to the closed state or from the closed state to the open state, the movable shield 21 and the movable conductor 22 are disconnected from each other at a relative speed by the motors 36 and 38. It moves in the longitudinal direction of the vessel 1, that is, in the right or left direction in FIG. For example, if the rotation speeds of the motors 36 and 38 are the same, the moving amount L2 of the movable shield 21 is smaller than the moving amount L1 of the movable conductor 22 (L2 <L1), and the moving speed V2 of the movable shield 21 is The pitch diameters D1 and D2 of the first and second rotating gears 31 and 32 are set so as to have a relationship (V2 <V1) smaller than the moving speed V1 of the movable conductor 22.

  That is, when the movable shield 21 and the movable conductor 22 start moving simultaneously, the movable shield 21 moves the distance L2 in a predetermined time by the second rotating gear 32, the second linear gear 34, and the motor 36. Similarly, the movable conductor 22 and the movable side arc-proof electrode 23 move the distance L1 in this predetermined time by the first rotating gear 31, the first linear gear 33, and the motor 38. The position of the movable shield 21 is closer to the fixed shield 12 side than the open state during the movement operation to the closed state.

  As shown in FIG. 11, in the closed state, the movable conductor 22 and the movable side arc-proof electrode 23 end the movement of the distance L1. As a result, the fixed-side arc-proof electrode 13 of the fixed contact portion 3 is inserted into the concave portion 22 c formed at the center portion of the end surface 22 a of the movable conductor 22, and the movable conductor 22 is fixed to the fixed-side conductive contact 11 of the fixed contact portion 3. To touch.

  Similarly, the movable shield 21 ends the movement of the distance L2. As a result, the end surface 21 c of the movable shield 21 contacts the end surface 12 a of the fixed shield 12.

  As described above, in this embodiment, the moving speeds of the movable shield 21 and the movable conductor 22 are controlled by the two motors 36 and 38, respectively, and can be moved to the distances L2 and L1, for example, at the same time. The surface electric field of the re-ignition arc 5 is suppressed, and even if this re-ignition arc occurs, a ground fault to the tank 2 can be prevented, and an economical and highly reliable disconnector can be provided.

  In addition, the moving speed of the movable shield 21 and the movable conductor 22 can be controlled by the motors 36 and 38, respectively, so that the movement of the movable conductor 22 can be started before the movement of the movable shield 21. In this case, the pitch diameters D1 and D2 of the first and second rotating gears 31 and 32 may be equal or different.

(Embodiment 3)
12-17 is sectional drawing which shows schematic structure of the disconnecting device 1 of Embodiment 3 of the invention, and the drive part 30 of the disconnecting device 1, FIG. 12 is an opening position, FIG. 13 is C arrow view of FIG. 14 is a view showing the movable contact portion during operation, FIG. 15 is a view taken along the arrow C in FIG. 14, FIG. 16 is a cross-sectional view at the closed position, and FIG.

  As illustrated in FIGS. 12 to 17, the drive unit 30 includes a first rod 41, a second rod 42, and a link lever 43.

  One end of the first rod 41 is rotatably connected to the recess 22e of the movable conductor 22. The recess 22e is provided with a long groove 22f, and one end of the second rod 42 is pivotally connected to the movable shield 21 through the recess 22e.

  The link lever 43 has a rotating shaft 44 at one end, and this rotating shaft 44 is connected to, for example, a motor (not shown) outside the disconnector 1. As a result, the link lever 43 can rotate around the rotation shaft 44. The rotating shaft 44 passes through the tank 2 and the terminal-side conductor 20.

  In the link lever 43, the other end of the first rod 41 is located at a distance (rotation diameter) R1 from the position of the rotation shaft 44, and the second rod is located at a distance (rotation diameter) R2 from the position of the rotation shaft 44. The other end of 42 is connected so that rotation is possible respectively.

  Thereby, the first rod 41 can convert the rotational movement of the link lever 43 into the linear movement of the movable conductor 22. Further, the second rod 42 can convert the rotational motion of the link lever 43 into the linear motion of the movable shield 21.

  The distances R1 and R2 of the link lever 43 are in a relationship of R1> R2. The ratio of the distances R1 and R2 is equal to the ratio of the moving amounts L1 and L2 of the movable conductor 22 and the movable shield 21. That is, the relationship is R1: R2 = L1: L2.

  With this configuration, when the link lever 43 rotates, the other end of the first rod 41 rotates around an axis of rotation R1 around the rotation shaft 44, and one end of the first rod 41 is a straight line having a distance L1. You can move with. Further, when the link lever 43 is rotated, the other end of the second rod 42 rotates while drawing an arc having a rotation diameter R2 around the rotation shaft 44, and one end of the second rod 42 is a straight line having a distance L2. Can move.

  That is, as shown in FIGS. 12 and 13, in the open state, the motor (not shown) keeps the angle of the link lever 43 from the vertical line S to a predetermined angle α1, for example, α1 = 30 degrees in the right direction in FIG. . Thereby, the fixed shield 12, the movable shield 21, and the movable conductor 22 (movable-side arc-proof electrode 23) are separated from each other at a position where a predetermined withstand voltage performance can be maintained, that is, the distance L1.

  As shown in FIGS. 14 and 15, during the movement operation from the open state to the closed state or from the closed state to the open state, the movable shield 21 and the movable conductor 22 are moved relative to each other by the drive unit 30. , It moves in the longitudinal direction of the disconnector 1, that is, in the right or left direction in FIG. At this time, the moving amount (distance L2) of the movable shield 21 is smaller than the moving amount (distance L1) of the movable conductor 22 (L2 <L1), and the moving speed V2 of the movable shield 21 is higher than the moving speed V1 of the movable conductor 22. The distances R1 and R2 of the first and second rods 41 and 42 are set so as to have a small relationship (V2 <V1).

  Here, for example, as shown in FIG. 15, when the angle of the link lever 43 is 0 degree equal to the vertical line S, the moving amount of the movable shield 21 is L2 / 2 and the moving amount of the movable conductor 22 is L1 / 2. Become. The movable shield 21 moves the distance L2 in a predetermined time by the second rod 42, the link lever 43 and the motor. Similarly, the movable conductor 22 and the movable arc-proof electrode 23 move the distance L1 in this predetermined time by the first rod 41, the link lever 43, and the motor. The position of the movable shield 21 is closer to the fixed shield 12 side than the open state during the movement operation to the closed state.

  As shown in FIGS. 16 and 17, in the closed state, the movable conductor 22 and the movable-side arc-proof electrode 23 finish the movement of the distance L1, and the movable shield 21 finishes the movement of the distance L2. Here, as shown in FIG. 17, for example, the motor holds the angle of the link lever 43 from the vertical line S at a predetermined angle α2, for example, α2 = 30 degrees in the left direction in FIG.

  As a result, the fixed-side arc-proof electrode 13 of the fixed contact portion 3 is inserted into the concave portion 22 c formed at the center portion of the end surface 22 a of the movable conductor 22, and the movable conductor 22 is fixed to the fixed-side conductive contact 11 of the fixed contact portion 3. To touch.

  Similarly, the movable shield 21 ends the movement of the distance L2. As a result, the end surface 21 c of the movable shield 21 contacts the end surface 12 a of the fixed shield 12.

  As described above, in this embodiment, the moving speed of the movable shield 21 and the movable conductor 22 is controlled by one motor, the first rod 41, the second rod 42, and the link lever 43, respectively. Since it can be moved to L2 and L1, the surface electric field of the re-ignition arc 5 due to the inter-electrode discharge is suppressed, and even if this re-ignition arc occurs, a ground fault to the tank 2 can be prevented, A highly reliable disconnector can be provided.

  In this embodiment, the first rod 41 and the second rod 42 are connected to the same motor via the same link lever 43. However, the present invention is not limited to this. For example, the first rod 41 and the second rod 42 are different via different link levers. It is also possible to connect to the motor separately. However, in this case, similarly to this embodiment, the moving speeds of the movable shield 21 and the movable conductor 22 are controlled to move to the distances L2 and L1 at the same time. It is also possible to start before moving. In this case, the rotation diameters R1 and R2 of the other ends of the first rod 41 and the second rod 42 may be equal or different.

(Embodiment 4)
18-19 is sectional drawing which shows schematic structure of the disconnector 1 of Embodiment 4 of this invention, FIG. 18 is a figure which shows the cross section in an opening position, FIG. 19 is a closing position.

  As shown in the first embodiment, in the closed state, the outer peripheral surface 21b of the movable shield 21 is at a long distance from the end surface 22a of the movable conductor 22, so that the surface electric field rises and there is a risk of dielectric breakdown.

  Therefore, as shown in FIGS. 18 and 19, the movable shield 21 is disposed so as to always cover the end 20 a of the terminal-side conductor 20. That is, the end 21d of the shield part 21b of the movable shield 21 is installed extending in the longitudinal direction of the disconnector 1 (right direction in FIGS. 18 and 19), and the inner peripheral surface of the shield part 21b and the outer periphery of the cylindrical part 21a. It covers and arrange | positions so that the edge part 20a of the terminal side conductor 20 may be pinched | interposed with a surface.

  Thus, in this embodiment, since the movable shield 21 always moves while covering the end portion 20a of the terminal-side conductor 20 both in the open state and in the closed state, the end portion 21d of the shield portion 21b and the terminal side The surface electric field of the high voltage electrode at the end 20a of the conductor 20 can be suppressed, the dielectric breakdown from the high voltage electrode such as the movable shield 21 can be prevented, and a highly reliable disconnector can be provided.

(Embodiment 5)
FIG. 20 is a cross-sectional view illustrating the configuration of the drive unit of the disconnector 1 according to the fifth embodiment of the present invention, and is a diagram illustrating a cross-section during the operation of the movable contact unit.
In Embodiment 1 or the like, at least two current-carrying contacts 24 and 25 are arranged to electrically connect the terminal-side conductor 20 and the movable conductor 22, but the contact resistance value may increase.

  Therefore, as shown in FIG. 20, a flange 22 g is provided in which the end of the movable conductor 22 on the movable side terminal (right side in FIG. 20) is projected in the inner circumferential direction of the terminal side conductor 20. An energizing contact 26 that contacts the inner peripheral surface of the terminal-side conductor 20 is disposed on the outer peripheral surface of the flange 22g. The energizing contact 26 is formed of, for example, a multi-surface contact type sliding contact, and is always in contact with the inner peripheral surface of the terminal-side conductor 20.

  Thus, in this embodiment, since the terminal-side conductor 20 and the movable conductor 22 are connected by one energizing contact 26, the energizing contacts are reduced and the contact resistance value can be reduced. As a result, the contact resistance It is possible to suppress energization loss that occurs in proportion to the value.

  Furthermore, in this embodiment, the length of the movable conductor can be shortened by storing the energizing contact on the movable conductor 22 side, compared with the case where the energizing contact is accommodated on the movable shield 21 side. Can be provided.

  In addition, by using a multi-surface contact type sliding contact for the current-carrying contact, the volume for housing the contact can be reduced while ensuring a predetermined current-carrying capacity, and an economical and highly reliable disconnector is provided. Can be provided.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 1 ... Disconnector, 2 ... Tank, 3 ... Fixed contact part, 4 ... Movable contact part, 5 ... Re-ignition arc, 10 ... Fixed conductor, 10a ... End part, 10b ... Recessed part, 11 ... Fixed side electricity supply contactor, DESCRIPTION OF SYMBOLS 12 ... Fixed shield, 12b ... Through-hole, 13 ... Fixed side arc-proof electrode, 20 ... Terminal side conductor, 21 ... Movable shield, 21a ... Cylindrical part, 21b ... Shield part, 22 ... Movable conductor, 22a ... End surface, 22b ... Outer peripheral surface, 22c ... concave portion, 22d ... end face, 22e ... concave portion, 22f ... long groove, 23 ... movable side arc-proof electrode, 24-26 ... energizing contact, 30 ... driving portion, 31, 32 ... rotating gear, 33, 34 ... linear gears, 35, 37 ... rotating shafts, 36, 38 ... motors, 41, 42 ... rods, 43 ... link levers, 44 ... rotating shafts, D1, D2 ... pitch diameters, L1, L2 ... distance (movement amount), R1, R2 ... distance (rotating diameter), V1, V2 ... shift Speed.

Claims (15)

A fixed conductor having an end and a recess disposed at the end; and
A fixed shield having an end surface fixed to the end portion and a through-hole disposed in the end surface corresponding to the concave portion;
A movable conductor having one end that faces or contacts the fixed conductor and can be inserted into the recess, and an outer peripheral surface;
A movable shield having an end surface facing or contacting the end surface of the fixed shield, and an inner peripheral surface engaged with the outer peripheral surface of the movable conductor;
A first state in which the movable conductor and the movable shield are spaced apart and opposed to the fixed conductor and the fixed shield, and one end of the movable conductor is inserted into contact with the concave portion of the fixed conductor, and the end surface of the fixed shield A driving unit that moves the movable conductor and the movable shield between the second state where the end face of the movable shield contacts; and
A sealed container that houses the fixed conductor, the fixed shield, the movable conductor, and the movable shield;
Disconnector characterized by comprising. The moving amount of the movable conductor from the first state to the second state is larger than the moving amount of the movable shield from the first state to the second state. The disconnector described. 3. The disconnector according to claim 2, wherein the driving unit moves the movable conductor and the movable shield such that a moving speed of the movable conductor is larger than a moving speed of the movable shield. The disconnector according to claim 3, wherein the driving unit simultaneously starts moving the movable conductor and the movable shield. The disconnector according to claim 2, wherein the driving unit starts the movement of the movable conductor before the movement of the movable shield. 6. The disconnector according to claim 5, wherein moving speeds of the movable conductor and the movable shield are the same. The drive unit includes a first rotating gear,
A first linear gear that converts rotational motion of the first rotating gear into linear motion of the movable conductor;
A second rotating gear;
A second linear gear that converts rotational motion of the second rotating gear into linear motion of the movable shield;
The disconnector according to claim 1, further comprising: The disconnector according to claim 7, wherein the first rotating gear and the second rotating gear are rotated by the same motor. The disconnector according to claim 7, wherein the first rotating gear and the second rotating gear are rotated by different motors. The drive unit includes a link lever having a rotation shaft at one end;
A first rod that connects the movable shield and the link lever, converts the rotational movement of the link lever into a linear movement, and moves the movable shield;
A second rod for connecting the movable conductor and the link lever, and converting the rotational movement of the link lever into a linear movement to move the movable conductor;
A motor connected to the rotating shaft and rotating the link lever;
The disconnector according to claim 1, comprising: The disconnector according to claim 1, further comprising an outer conductor having a cylindrical shape and having an inner peripheral surface disposed outside the outer peripheral surface of the movable conductor and an outer peripheral surface. An outer peripheral surface that engages with the outer peripheral surface of the outer conductor; and an outer peripheral surface that engages with the inner peripheral surface of the outer conductor, and further includes a current-carrying conductor that conducts the movable conductor and the outer conductor. The disconnector according to claim 11. The disconnector according to claim 11, wherein the movable conductor has a contact that contacts an inner peripheral surface of the outer conductor. The disconnector according to claim 11, wherein an electron emission suppressing layer for suppressing electron emission is disposed on at least a part of the outer peripheral surface of the outer conductor and the outer peripheral surface of the movable shield. The movable shield has a cylindrical convex portion, and the convex portion has an inner peripheral surface that is in contact with the outer peripheral surface on one end side of the outer conductor in both the first and second states. The disconnector according to claim 11.

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