JP2015076160A - Disconnector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly accurately detect a load on a drive source with a simple structure without interrupting the supply of electric power.SOLUTION: In a disconnector 1, a torque detection part 61 is provided in the middle of a driving rod 51 that transmits power from a drive device 45 to a rotating insulator device 22 and a blade 34, and whether or not an amount of a torque acting on the driving rod 51 has reached a prescribed set torque amount is detected. Specifically, the driving rod 51 is divided into an upper rod piece and a lower rod piece, a spring and a plurality of electrodes are provided between the upper rod piece and the lower rod piece, and a contact detection circuit for detecting contact between electrodes is provided. When the amount of the torque acting on the driving rod 51 reaches the set torque amount, the electrodes make contact with each other, and the contact detection circuit detects the contact and outputs a detection signal.

Description

  The present invention relates to a disconnector that opens and closes a power line.

  Mainly a horizontal two-point cutting path device provided in a power plant, a substation, etc. includes a base and a rotary lever device provided on the base so as to be rotatable about a first axis extending in the vertical direction as a rotation axis. A pair of fixed lever devices which are arranged on the left and right sides of the rotary lever device and are provided on the base in a non-rotatable manner, contacts which are fixed to the upper end portions of the respective fixed lever devices, and upper end portions of the rotary lever devices. And a drive source for generating power for rotationally driving the rotary lever device, and a drive rod for transmitting the power of the drive source to the rotary lever device (see FIG. 1 of Patent Document 1 below) ).

  The blade is a conductive member formed in a long flat plate shape extending in the horizontal direction, and an intermediate portion thereof is supported by the upper end portion of the rotary lever device. Accordingly, when the rotary lever device is rotated by the power generated from the drive source, the blade rotates together with the rotary lever device about the first axis as the rotation axis. By this rotation, when the blade moves to the entry position, the left end portion of the blade comes into contact with the contact provided on the fixed lever device arranged on the left side, and the right end portion of the blade is arranged on the right side. Contact with the contact provided on the. On the other hand, when the blade moves to the cutting position by rotation about the first axis of the blade, each end of the blade is separated from the contact. Since one contact is connected to the power supply side of the power line and the other contact is connected to the load side of the power line, when the blade moves to the entry position, the power line is closed and the blade is cut off. When moving to, the power line opens.

  In addition, in the horizontal two-point cutting path device, the second shaft extending in the horizontal direction (the blade extending direction) is connected to the rotating shaft in conjunction with the rotation of the rotary lever device about the first shaft as the rotating shaft. Some have a mechanism for rotating the blade. That is, in a horizontal two-point cutting path equipped with such a mechanism, the blade rotates 90 degrees while the blade moves from the cutting position to the entering position, and the flat blade is standing from the lying position. Change to the state. During this time, the blade in the sleeping state first enters between the end portions of the U-shaped contact, and then the blade changes to a standing state so that the edge of the blade contacts the inner surface of the contact Then, the contact is pressed from the inside to the outside. Thereby, a braid | blade and a contactor contact reliably (refer FIG. 10 of patent document 1).

  Further, the horizontal two-point disconnecting path device applied to the three-phase power line includes a rotary lever device, a pair of fixed lever devices, a contact provided in each fixed lever device, a blade provided in the rotary lever device, and Three sets of units having a mechanism for rotating the blade around the second axis as a rotation axis are provided on the base, and these three sets of units are driven by one drive source. That is, a transmission rod is connected to each of the three rotary lever devices, and the transmission rod is connected to a drive source via a drive rod or the like. When the drive source is driven, the power is transmitted to the three rotary lever devices through the drive rod and the transmission rod, respectively, and these rotary lever devices rotate simultaneously around the first axis as the rotation axis. Further, when the three rotary lever devices rotate with the first axis as the rotation axis in this way, the three blades rotate in unison with the second axis as the rotation axis in conjunction with them (Patent Document 1). FIG. 1). Thereby, the opening and closing of the three-phase power line is switched simultaneously.

  Patent Document 2 below describes an operation diagnosis device for a switch using compressed air as a drive source.

JP 2013-120719 A JP 2006-329939 A

  The horizontal two-point disconnecting device described above rotates three rotary levers with a first axis as a rotation axis with respect to a base by power generated from one drive source in order to switch between opening and closing of the power line. At the same time, the three blades are rotated with respect to the rotary lever device using the second axis as the rotation axis. Therefore, the horizontal two-point disconnector has many portions that can move simultaneously based on power generated from one drive source when the power line is opened and closed.

  For this reason, if sticking or galling occurs in the movable part of the horizontal two-point cutting path device, the load applied to the drive source becomes excessive when the power line is opened and closed, and the drive source moves the blade between the cutting position and the entering position. At this time, there is a risk that problems such as the blade stopping in the middle may occur.

  It seems that the occurrence of such problems can be suppressed by shortening the inspection cycle of the horizontal two-point disconnector. However, conventionally, an inspection of a horizontal two-point cutting device has been manually performed by an operator using a torque handle for manual operation measurement. For this reason, at the time of inspection, the supply of electric power must be stopped, and therefore it is difficult to increase the inspection cycle.

  Further, in a disconnector that employs an electric motor as a drive source, a technique is known in which it is determined by diagnosing a current waveform of the electric motor to determine whether or not an excessive load is applied to the drive source. Further, in Patent Document 2 described above, in a switch using compressed air as a drive source, an operation torque is obtained from the relationship between the change in pressure in the operation cylinder and the operation time, and the operation of the switch is diagnosed based on this. The technology to do is described. Inspections using these technologies are likely to be performed without stopping the power supply. However, these technologies have a complicated configuration and are difficult to implement at low cost, or it is not easy to improve the accuracy of diagnosis and determination. Of the two technologies described above, one technology cannot be applied when compressed air is used as a drive source, and the other technology cannot be applied when an electric motor is used as a drive source. The application range is narrow.

  Such a problem may occur not only in a horizontal two-point disconnecting switch but also in other types of disconnecting switches such as a horizontal one-point disconnecting switch.

  The present invention has been made in view of the above-described problems, for example, and an object of the present invention is to detect a load applied to a drive source with a simple configuration with high accuracy and without stopping power supply. It is in providing the disconnector which can do.

  In order to solve the above-mentioned problem, a first disconnector of the present invention is rotatably supported on a base, and a blade that switches connection and disconnection of a power line by rotating, and power that rotates the blade. A drive source that emits power, a drive rod that transmits power generated by the drive source to the blade, and an amount of torque that acts on the drive rod when the blade is rotated by the drive source is a predetermined set torque amount. And a torque detector for detecting whether or not it has been reached.

  Further, the second disconnector of the present invention is the above-described first disconnector of the present invention, wherein the torque detection unit has a twist amount on the other end side with respect to one end side of the drive rod set to a predetermined set twist amount. It is characterized by detecting whether or not it has been reached.

  According to a third disconnector of the present invention, in the first disconnector of the present invention described above, the drive rod is divided into a first rod piece and a second rod piece having a common rotation axis. An elastic member is provided between the first rod piece and the second rod piece, and the torque detector has a predetermined amount of rotation of the second rod piece relative to the first rod piece. It is characterized in that it is detected whether or not the set rotation amount is reached.

  Further, the fourth disconnector of the present invention is the above-described third disconnector of the present invention, wherein the torque detector includes the first electrode provided on the first rod piece, and the second disconnector. A rod piece provided with a second electrode provided at a position facing the first electrode, and a contact detection circuit for detecting contact between the first electrode and the second electrode; The electrode and the second electrode do not contact each other while the rotation amount of the second rod piece with respect to the first rod piece does not reach the set rotation amount, and the first electrode with respect to the first rod piece. The second rod piece contacts when the rotation amount reaches the set rotation amount.

  The fifth disconnector of the present invention is the above-described first to fourth disconnector of the present invention described above, wherein the blade rotates the first shaft by the power generated from the driving source. While rotating as an axis | shaft, it rotates using the 2nd axis | shaft which intersects with the said 1st axis | shaft as a rotating shaft.

  ADVANTAGE OF THE INVENTION According to this invention, the load concerning the drive source of a disconnector can be detected with a simple structure with high precision, and without stopping supply of electric power.

It is explanatory drawing which shows the disconnector by embodiment of this invention. It is explanatory drawing which shows the contact member provided in the fixed lever apparatus, and the member provided in the periphery in the disconnector by embodiment of this invention. It is explanatory drawing which shows a rotary lever apparatus, a blade, and a blade rotation mechanism in the disconnector by embodiment of this invention. It is explanatory drawing which shows the drive device, drive rod, and torque detection part in the disconnector by embodiment of this invention. It is explanatory drawing which shows rotation operation | movement which made the X-axis of the blade the rotating shaft in the disconnector by embodiment of this invention. It is explanatory drawing which shows rotation operation | movement which made the Y-axis of the blade the rotating shaft in the disconnector by embodiment of this invention. It is sectional drawing which looked at the torque detection part in the disconnector by embodiment of this invention from the arrow VII-VII direction in FIG. It is sectional drawing which looked at the torque detection part in the disconnector by embodiment of this invention from the arrow VIII-VIII direction in FIG. It is explanatory drawing which shows the cylindrical member of a torque detection part, a pair of wing | blade part, etc. in the disconnector by embodiment of this invention. It is explanatory drawing which shows the electrical structure regarding a torque detection in the disconnector by embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a disconnector according to an embodiment of the present invention. In the present embodiment, for convenience of explanation, the respective directions of up, down, left, right, front, and back are defined as indicated by arrows shown at the bottom left in FIG.

  In FIG. 1, the disconnect switch 1 according to the embodiment of the present invention includes, for example, three disconnect units 14 installed on a pair of beam portions 13 fixed on a pair of mounting tables 12. Each disconnection unit 14 is mainly composed of a base 21, a rotary lever device 22, a pair of fixed lever devices 26, a contact 29 provided on each fixed lever device 26, and a blade 34 provided on the rotary lever device 22. Yes. In each disconnection unit 14, for example, the power contact side of the power line is connected to the left contact 29, and the load side of the power line is connected to the right contact 29 (not shown). The disconnector 1 also includes a drive device 45 that rotationally drives the rotary lever device 22 and the blade 34 of each disconnection unit 14. Further, the disconnector 1 is a drive that transmits rotational power from the driving device 45 to the rotating lever device 22 of each disconnecting unit 14 when the driving device 45 rotationally drives the rotating lever device 22 and the blade 34 of each disconnecting unit 14. A torque detector 61 for detecting the torque acting on the rod 51 is provided.

  In each disconnection unit 14, the base 21 has a mounting surface that extends in the horizontal direction, and is fixed to the pair of beam portions 13.

  In each disconnection unit 14, the rotary lever device 22 is disposed on the base 21 in the middle portion in the left-right direction and extends in the up-down direction. The rotary lever device 22 has a lever formed of porcelain and insulates the base 21 from the blade 34. In FIG. 1, drawing of the specific shape of the lever of the rotary lever device 22 is omitted.

  The base end side of the rotary lever device 22 is attached to the base 21 via a bearing device 23. Thereby, the rotary lever device 22 can rotate with the axis X extending in the vertical direction as the rotation axis. A connecting portion 24 is provided on the proximal end side of the rotary lever device 22, and a transmission rod 54 described later is connected to the connecting portion 24.

  In each disconnecting unit 14, the pair of fixed lever devices 26 are arranged on the left side and the right side of the rotary lever device 22 on the base 21. Each stationary lever device 26 extends in the vertical direction, and its proximal end is fixed to the base 21 through a fixing member 27 so as not to rotate. Each stationary lever device 26 has a lever formed of porcelain and insulates the base 21 and the contact 29 from each other. In FIG. 1, drawing of the specific shape of the lever of the fixed lever device 26 is omitted.

  FIG. 2 shows a contact 29 provided in the fixed lever device 26 of each disconnecting unit 14 and members provided in the vicinity thereof. In FIG. 2, each contactor 29 is formed in a U shape by a conductive material. Each contact 29 is fixed to the upper end portion of the fixed lever device 26 via an L-shaped support member 30.

  In addition, an attachment member 31 formed in an L shape is disposed next to each contact 29 and at a position closer to the middle of the blade 34 than each contact 29. The attachment member 31 is fixed to the support member 30 together with the contact 29. In addition, a pushing member 32 formed in an L shape is fixed to the upper portion of the attachment member 31.

  FIG. 3 shows the rotary lever device 22 and the blades 34 in each disconnection unit 14. In FIG. 3, the blade 34 is formed in a long plate shape that extends in the horizontal direction using a conductive material. The blade 34 is rotatably supported on the base 21 via the rotary lever device 22 with the X axis as a rotation axis. Specifically, the horizontal portion of the blade 34 is attached to the upper end portion of the rotary lever device 22 via the blade rotation mechanism 35. Further, blade contacts 36 formed by bending a flat plate member having conductivity are attached to both ends of the blade 34, respectively.

  A knock pin 37 and a stopper 38 are attached to the base end portion of each blade contact 36. A knock pin 37 attached to one blade contact 36 located on the left side in FIG. 3 is arranged so as to extend upward from the blade contact 36 when the blade 34 is in a cutting position described later. Further, the stopper 38 attached to the one blade contact 36 is disposed so as to extend upward from the blade contact 36 when the blade 34 is in an entry position described later. Further, the knock pin 37 attached to the other blade contact 36 located on the right side in FIG. 3 is arranged to extend downward from the blade contact 36 when the blade 34 is in the cutting position. Further, the stopper 38 attached to the other blade contact 36 is disposed so as to extend downward from the blade contact 36 when the blade 34 is in the entering position.

  The blade rotation mechanism 35 is a mechanism that rotates the blade 34 about an axis Y orthogonal to the axis X as a rotation axis. The blade rotation mechanism 35 includes a support base 40 fixed to the upper end portion of the rotary lever device 22 and a support member 41 fixed on the support base 40. The intermediate portion of the blade 34 is supported by the support member 41 so as to be rotatable about an axis Y extending in the horizontal direction as a rotation axis. The blade rotation mechanism 35 includes a guide member 42 that guides the rotation of the blade 34 having the axis Y as the rotation axis and limits the rotation range. Further, the blade rotation mechanism 35 includes a safety device 43. The safety device 43 is a device that assists the necessary rotation of the blade 34 with the Y axis as a rotation axis by a built-in spring and suppresses unnecessary rotation of the blade 34 with the Y axis as a rotation axis. Specific operation of the safety device 43 will be described later.

  FIG. 4 shows the drive device 45 and the like. 4, in the housing 46 of the drive device 45, there are an electric motor 47 as a drive source, gears 49 and 50 for transmitting power from the output shaft 48 of the electric motor 47 to the drive rod 51, a contact detection circuit 67, an alarm device. 68, and a transmission circuit 75.

  Further, as shown in FIG. 1, the disconnector 1 is a member that transmits the rotational power output from the electric motor 47 to the rotary lever device 22 in each disconnecting unit 14, and includes a drive rod 51, a transmission member 52, and a rotation operation member 53. (See FIG. 5) and a pair of transmission rods 54.

  The drive rod 51 is formed, for example, in a rod shape from a metal material, extends in the vertical direction, and the lower end side is inserted into the housing 46 of the drive device 45. In the housing 46, a gear 49 is fixed to the lower end portion of the drive rod 51, and the gear 49 meshes with a gear 50 fixed to the output shaft 48 of the electric motor 47. The upper end of the drive rod 51 is connected to the transmission member 52.

  The transmission member 52 has one end connected to the upper end of the drive rod 51 and the other end fixed to the proximal end of the rotary lever device 22 of the disconnecting unit 14 disposed on the front side of the disconnector 1. The operation member 53 is connected.

  Each transmission rod 54 extends in the horizontal direction and is connected to a connecting portion 24 provided on the base end side of the rotary lever device 22 of each disconnecting unit 14.

  FIG. 5 shows the rotation operation about the X-axis of the rotary lever device 22 and the blade 34 of each disconnection unit 14 by the power generated from the electric motor 47. In FIG. 5, when the electric motor 47 is driven, the power generated from the electric motor 47 and output from the output shaft 48 is transmitted to the drive rod 51 via the gears 50 and 49, whereby the drive rod 51 rotates. To do. The rotation of the drive rod 51 is transmitted via the transmission member 52 and the rotation operation member 53 to the rotary lever device 22 of the disconnecting unit 14 arranged at the foremost side in the disconnector 1. The axis rotates as the axis of rotation. The rotation of the rotary lever device 22 is caused by the rotation of the rotary lever device 22 of the disconnecting unit 14 disposed in the middle part of the disconnector 1 and the disconnecting unit 14 disposed at the innermost position of the disconnector 1 via the transmission rod 54. This is transmitted to the lever device 22, whereby the two rotary lever devices 22 rotate around the X axis as a rotation axis. When the rotary lever device 22 rotates in each disconnection unit 14 in this way, the blade 34 rotates with the X axis as the rotation axis.

  In each disconnection unit 14, when the rotary lever device 22 and the blade 34 rotate, for example, clockwise about the X axis as a rotation axis, and the blade 34 moves from the cutting position shown in FIG. The blade contacts 36 are in contact with the contacts 29, respectively. As a result, the power supply side of the power line connected to the left contact 29 of each disconnecting unit 14 and the load side of the power line connected to the right contact 29 are electrically connected via the blade 34. The

  On the other hand, when the rotary lever device 22 and the blade 34 are rotated counterclockwise, for example, with the X axis as the rotation axis, and the blade 34 is moved from the entering position to the cutting position shown in FIG. Separate. Thereby, the power supply side of the power line connected to the left contact 29 of each disconnecting unit 14 and the load side of the power line connected to the right contact 29 are disconnected.

  FIG. 6 shows a rotation operation with the Y axis of the blade 34 of each disconnecting unit 14 as the rotation axis by the power generated from the electric motor 47. In each disconnection unit 14, when the blade 34 is in the cutting position, as shown in FIG. 3, the blade contacts 36 provided at both ends of the blade 34 are in a state of lying down horizontally. Further, the knock pin 37 disposed on the left side of the blade 34 faces upward, and the knock pin 37 disposed on the right side of the blade 34 faces downward.

  When the electric motor 47 is driven and the blade 34 rotates clockwise from the cutting position to the entering position with the X axis as the rotation axis, and each blade contact 36 approaches the contact 29, as shown in FIG. Each knock pin 37 contacts the push member 32.

  When the blade 34 further rotates clockwise about the X axis as a rotation axis, each knock pin 37 is pushed by the pushing member 32, and as shown in FIG. 6 (2), the blade 34 rotates the Y axis (see FIG. 3). Rotates clockwise as an axis. Thereby, each blade contact 36 begins to rise. Each blade contact 36 enters the contact 29.

  When the blades 34 further rotate clockwise with the X axis as the rotation axis, each knock pin 37 is pushed by the pushing member 32, and the clockwise rotation amount with the Y axis of the blade 34 as the rotation axis is a predetermined amount (for example, 45 degrees). ). When the rotation amount of the blade 34 exceeds the predetermined amount as described above, each knock pin 37 is separated from the pushing member 32, and the pressing force from the pushing member 32 cannot be obtained, but instead, it is built in the safety device 43. The blade 34 is pushed by the spring, and the blade 34 continues to rotate clockwise with the Y axis as the rotation axis. Then, as shown in FIG. 6 (3), each blade contact 36 rises vertically. When each blade contact 36 stands vertically, the edge of each blade contact 36 presses the contact 29 outward in the vertical direction. Thereby, each blade contact 36 contacts the contact 29 reliably. Thus, when the blade contact 36 rises vertically, the blade 34 reaches the entry position. At this time, the drive of the electric motor 47 is stopped.

  On the other hand, when the electric motor 47 is driven and the blade 34 rotates counterclockwise from the entering position to the cutting position about the X axis as the rotation axis, the stopper 38 hits the pushing member 32 and the stopper 38 is pushed by the pushing member 32. The blade 34 starts to rotate counterclockwise about the Y axis as a rotation axis. Then, each blade contact 36 goes out from the contact 29. When the amount of counterclockwise rotation about the Y axis of the blade 34 exceeds a predetermined amount (for example, 45 degrees), the blade 34 is pushed by a spring built in the safety device 43, and the blade 34 rotates about the Y axis. Continue counterclockwise rotation. When the blade 34 reaches the cutting position, the blade contact 36 returns to the state of lying down horizontally.

  Here, the description of the operation of the safety device 43 will be supplemented. That is, the safety device 43 is configured such that the blade 34 reaches the cutting position after the blade contact 36 lies horizontally in the process of moving the blade 34 from the entering position to the cutting position, and then the blade 34 is cut. By starting to move from the position to the entry position, the blade 34 is pushed and supported by the built-in spring until the knock pin 37 is pushed by the pushing member 32 and the blade contact 36 starts to change into the standing state in the process. The rotation of the blade 34 with the Y axis as the rotation axis is prevented, and the blade contact 36 is held in a lying state.

  Further, the safety device 43 pushes the blade 34 by a built-in spring when the blade 34 approaches the entering position and the knock pin 37 is pushed by the pushing member 32 and the blade contact 36 changes to a vertical state. The blade 34 is assisted to rotate clockwise around the Y axis, and the blade contact 36 is changed to a vertical state. When the blade 34 rotates clockwise about the Y axis and the blade contact 36 is changed from a lying state to a vertically standing state, when the blade 34 starts to rotate clockwise, When the blade 37 is pushed by the pushing member 32, the blade 34 rotates clockwise against the spring built in the safety device 43. However, when the rotation amount of the blade 34 exceeds a predetermined amount, the safety device 43 is dead. Beyond that point, a spring built into the safety device 43 pushes the blade 34 to rotate the blade 34 clockwise.

  Further, the safety device 43 starts the movement of the blade 34 to the cutting position after the blade 34 reaches the entering position and the blade contact 36 stands upright, and the stopper 38 pushes against the pushing member 32. Until the blade contact 36 begins to change to a sleeping state, the blade 34 is pushed and supported by a built-in spring to prevent rotation of the blade 34 with the Y axis as a rotation axis, and the blade contact 36 is set up. Keep in state.

  In addition, the safety device 43 has a built-in spring that moves the blade 34 when the stopper 38 is pushed by the pushing member 32 and the blade contact 36 is laid down horizontally while the blade 34 moves from the entering position to the cutting position. 34 is pressed to assist the blade 34 in rotating counterclockwise about the Y axis as a rotation axis, and the blade contact 36 is changed to a state of lying down horizontally. When the blade 34 is rotated counterclockwise about the Y axis as a rotation axis and the blade contact 36 is changed from a standing state to a horizontally lying state, the blade 34 initially starts to rotate counterclockwise. When the stopper 38 is pushed by the pushing member 32, the blade 34 rotates counterclockwise against the spring built in the safety device 43. When the rotation amount of the blade 34 exceeds a predetermined amount, the safety device 43 exceeds the dead point, and the spring built in the safety device 43 pushes the blade 34 so as to rotate the blade 34 counterclockwise.

  7 to 10 show the torque detector 61. The torque detector 61 detects the amount of torque acting on the drive rod 51 when the electric motor 47 is driven and the rotary lever device 22 and the blade 34 of each disconnecting unit 14 are rotated by the power generated from the electric motor 47. It is a device to do. The torque detector 61 includes a cylindrical member 62 provided on the upper rod piece 51A of the drive rod 51, a pair of wing parts 63 provided on the lower rod piece 51B of the drive rod 51, the cylindrical member 62, and the wings. Springs 64 as a plurality of elastic members provided between the portions 63, a plurality of first electrodes 65 provided on the cylindrical member 62, and a plurality of second electrodes provided on each wing portion 63. 66, a contact detection circuit 67 that detects contact between the first electrode 65 and the second electrode 66, an alarm device 68, and a transmission circuit 75.

  As shown in FIG. 9, the drive rod 51 is divided into an upper rod piece 51A as a first rod piece and a lower rod piece 51B as a second rod piece. The upper rod piece 51A and the lower rod piece 51B have a common rotation axis.

  The cylindrical member 62 is formed in a covered cylindrical shape by, for example, a metal material, and is fixed to the lower end portion of the upper rod piece 51A. In addition, a pair of spring support portions 69 that protrude inward in the radial direction of the cylindrical member 62 and extend in the axial direction of the cylindrical member 62 are formed inside the cylindrical member 62.

  The pair of wing parts 63 are formed of a metal material, for example, and are plate-like members that protrude in the radial direction of the lower rod piece 51B and extend in the axial direction of the lower rod piece 51B, and the lower rod piece 51B. It is fixed to the upper end of the. Further, the upper end portion of the lower rod piece 51B and the pair of wing portions 63 are inserted into the cylindrical member 62 as shown in FIG. 7 or FIG.

  A plurality of springs 64 are provided between the spring support portion 69 and the wing portion 63 in the cylindrical member 62. Specifically, as shown in FIG. 7, the locations where the surfaces of the pair of wing portions 63 and the pair of spring support portions 69 face each other in the cylindrical member 62 are A, B, C, D. The four springs 64 are provided at each point as shown in FIG. Accordingly, a total of twelve springs 64 are provided between the pair of wing parts 63 and the spring support part 69. Each spring 64 has one end fixed to the wing 63 and the other end fixed to the spring support 69.

  When the electric motor 47 is driven, power generated from the electric motor 47 is transmitted to the lower rod piece 51B, and the lower rod piece 51B rotates clockwise or counterclockwise according to the rotation direction of the output shaft 48 of the electric motor 47. Rotate around. For example, when the lower rod piece 51 </ b> B rotates clockwise, each wing 63 pushes and receives the spring 64 at locations A and C in FIG. 7, and the spring 64 receives the spring support 69 of the tubular member 62. push. Thereby, upper rod piece 51A rotates clockwise. On the other hand, when the lower rod piece 51B rotates counterclockwise, each wing portion 63 pushes the spring 64 and receives the spring 64 at locations B and D in FIG. 7, and the spring 64 is a spring support portion of the tubular member 62. Press 69. Thereby, the upper rod piece 51A rotates counterclockwise. The rotation of the upper rod piece 51 </ b> A is transmitted to the rotary lever device 22 of each disconnecting unit 14 via the transmission member 52, the rotation operation member 53, and the transmission rod 54.

  As shown in FIG. 7, the first electrode 65 is fixed to a surface of each spring support portion 69 that faces the wing portion 63 via an insulating member 71. Further, the second electrode 66 is fixed to the surface of each wing portion 63 facing the spring support portion 69 via an insulating member 72. Further, the first electrode 65 and the second electrode 66 are disposed so as to face each other. In the present embodiment, for example, each spring support portion 69 is provided with two first electrodes 65, and the total number of first electrodes 65 is four. Each wing portion 63 is provided with two second electrodes 66, and the total number of second electrodes 66 is four. Each first electrode 65 and each second electrode 66 are connected to a contact detection circuit 67 via a cable, for example.

  The contact detection circuit 67 is a circuit that outputs a detection signal when any one of the first electrodes 65 comes into contact with the second electrode 66 facing the first electrode 65, and is configured as shown in FIG. 10, for example.

  The alarm device 68 is a device that outputs an alarm when a detection signal is output from the contact detection circuit 67. For example, when a detection signal is output from the contact detection circuit 67, the alarm device 68 lights or blinks a lamp arranged at an easily viewable position on the outer surface of the housing 46 of the driving device 45, or sounds a buzzer.

  The transmission circuit 75 is a circuit for transmitting the detection signal output from the contact detection circuit 67 to an external device having a communication function such as a remote monitoring control device. By transmitting the detection signal output from the contact detection circuit 67 to the remote monitoring control device or the like, the detection signal is concentrated via a remote monitoring control device or the like at a place different from the place where the disconnector 1 is installed. It can be transmitted to a control station or the like.

  The detection torque unit 61 operates as follows, for example. That is, when the amount of torque acting on the drive rod 51 is less than a predetermined set torque amount while the drive rod 51 rotates clockwise and the rotary lever device 22 and the blade 34 of each disconnecting unit 14 are rotated, 7, the springs 64 arranged at the locations A and C do not contract, or even when contracted, the amount of contraction is small. For this reason, the clockwise rotation amount of the lower rod piece 51B relative to the upper rod piece 51A is less than the set rotation amount. At this time, none of the first electrodes 65 is in contact with the second electrode 66. Therefore, a detection signal is not output from the contact detection circuit 67, the alarm device 68 does not output an alarm, and the transmission signal 75 is not transmitted. The same applies when the amount of torque acting on the drive rod 51 is less than the predetermined set torque amount while the drive rod 51 rotates counterclockwise and the rotary lever device 22 and the blade 34 of each disconnecting unit 14 are rotated. is there.

  On the other hand, when the amount of torque acting on the drive rod 51 becomes equal to or greater than a predetermined set torque amount while the drive rod 51 rotates clockwise and the rotary lever device 22 and the blade 34 of each disconnecting unit 14 are rotated, The springs 64 arranged at locations A and C in FIG. 7 contract greatly, and the clockwise rotation amount of the lower rod piece 51B with respect to the upper rod piece 51A becomes equal to or greater than the set rotation amount. At this time, the first electrode 65 and the second electrode 66 arranged at the location A or C are in contact with each other. Therefore, a detection signal is output from the contact detection circuit 67, and an alarm is output from the alarm device 68 accordingly. Further, the detection signal output from the contact detection circuit 67 is transmitted to the remote monitoring control device or the like by the transmission circuit 75.

  In addition, when the drive rod 51 rotates counterclockwise and the amount of torque acting on the drive rod 51 becomes equal to or greater than a predetermined set torque amount while the rotary lever device 22 and the blade 34 of each disconnecting unit 14 are rotated. 7, the springs 64 arranged at locations B and D in FIG. 7 are greatly contracted, and the amount of counterclockwise rotation of the lower rod piece 51B relative to the upper rod piece 51A is equal to or greater than the set rotation amount. At this time, the first electrode 65 and the second electrode 66 arranged at the location B or D are in contact with each other. Therefore, a detection signal is output from the contact detection circuit 67, and in response to this, an alarm is output from the alarm device 68, and the detection signal is transmitted to the remote monitoring control device or the like by the transmission circuit 75.

  For example, the set torque amount is set as follows. That is, in an abnormal state in which the movable part of the disconnector 1 is stuck or squeezed, the maximum torque acting on the drive rod 51 while the three blades 34 are moved simultaneously between the entering position and the cutting position. Measure large quantities. The measured value of the maximum amount of torque varies depending on the location and degree of the disconnector 1 being stuck or galling. For example, a repeated test is performed, or past inspection records are referred to, and the torque is measured. A maximum amount of multiple measurements is taken, for example, the average or maximum of these measurements. Then, a predetermined value corresponding to the margin is subtracted from an average value or a maximum value of a large number of measured values of the maximum amount of the torque, and a value obtained thereby is set as a set torque amount.

  The number of springs 64 and the strength of each spring 64 are set such that when a torque amount less than the set torque amount acts on the drive rod, the first electrode 65 and the second electrode 66 do not come into contact with each other, and the set torque amount. The first electrode 65 and the second electrode 66 are set in contact with each other when the above torque amount acts on the drive rod 51.

  As described above, according to the disconnector 1 according to the embodiment of the present invention, the torque detector 61 can detect the amount of torque acting on the drive rod 51, that is, the load applied to the electric motor 47. As a result, it is possible to discover that the movable part of the disconnector 1 is stuck or squeezed, or that the disconnector 1 needs to be maintained.

  In particular, the torque detector 61 has a simple configuration in which a spring 64 is provided between the tubular member 62 and the wing 63 to detect the presence or absence of contact between the first electrode 65 and the second electrode 66. Further, since the amount of torque acting on the drive rod 51 is directly detected by the contraction of the spring 64, the detection accuracy is excellent or high accuracy can be easily achieved. The load applied to the electric motor 47 can be detected without stopping the operation of 1. Therefore, according to the disconnector 1, the load applied to the electric motor 47 can be detected with a simple configuration with high accuracy and without stopping the power supply.

  Further, by transmitting the detection signal output from the contact detection circuit 67 to the remote monitoring control device or the like by the transmission circuit 75, the detection signal can be transmitted to a remote centralized control station or the like. Thereby, the operator can know quickly and easily that the disconnector 1 needs to be maintained.

  In the torque detector 61 described above, the number of the wing portions 63 and the spring support portions 69, the number of the springs 64, or the number of the first electrodes 65 and the second electrodes 66 can be changed as appropriate.

  Moreover, in the torque detection part 61, it replaces with the structure which provides the spring 64 of the type which expands-contracts to an axial direction between 51 A of upper rod pieces of the drive rod 51, and the lower rod piece 51B, and upper rod piece 51A and lower rod A configuration may be adopted in which a torsion spring is provided between the piece 51B and whether or not the twist amount of the lower rod piece 51B relative to the upper rod piece 51A has reached a predetermined set twist amount.

  Further, the present invention can be applied not only to a horizontal two-point disconnector but also to other types of disconnectors such as a horizontal one-point disconnector.

  Further, the present invention can be appropriately changed without departing from the spirit or idea of the invention which can be read from the claims and the entire specification, and a disconnector with such a change is also included in the technical idea of the present invention. included.

DESCRIPTION OF SYMBOLS 1 Disconnector 12 Mounting stand 13 Beam part 14 Disconnect unit 21 Base 22 Rotary insulator apparatus 23 Bearing apparatus 24 Connection part 26 Fixed insulator apparatus 27 Fixing member 29 Contact 30 Support member 31 Mounting member 32 Pushing member 34 Blade 35 Blade rotation mechanism 36 Blade contact 37 Knock pin 38 Stopper 40 Support base 41 Support member 42 Guide member 43 Safety device 45 Drive device 46 Housing 47 Electric motor (drive source)
48 Output shaft 49, 50 Gear 51 Drive rod 51A Upper rod piece (first rod piece)
51B Lower rod piece (second rod piece)
52 Transmission member 53 Rotation operation member 54 Transmission rod 61 Torque detection part 62 Cylindrical member 63 Wing part 64 Spring (elastic member)
65 First electrode 66 Second electrode 67 Contact detection circuit 68 Alarm 69 Spring support 71, 72 Insulating member 75 Transmission circuit

Claims (5)

A blade that is rotatably supported on the base and that switches between connecting and disconnecting the power line by rotating;
A drive source for generating power for rotating the blade;
A drive rod for transmitting power generated from the drive source to the blade;
A disconnector comprising: a torque detector configured to detect whether or not an amount of torque acting on the drive rod when the blade is rotated by the drive source has reached a predetermined set torque amount; .   The disconnector according to claim 1, wherein the torque detection unit detects whether or not a twist amount on the other end side with respect to one end side of the drive rod has reached a predetermined set twist amount. The drive rod is divided into a first rod piece and a second rod piece having a common rotation axis, and an elastic member is provided between the first rod piece and the second rod piece. And
2. The disconnector according to claim 1, wherein the torque detection unit detects whether or not a rotation amount of the second rod piece with respect to the first rod piece has reached a predetermined set rotation amount. . The torque detector
A first electrode provided on the first rod piece;
A second electrode provided at a position facing the first electrode in the second rod piece;
A contact detection circuit for detecting contact between the first electrode and the second electrode;
The first electrode and the second electrode do not contact each other while the rotation amount of the second rod piece relative to the first rod piece does not reach the set rotation amount, and the first rod The disconnector according to claim 3, wherein the disconnecting device contacts when the rotation amount of the second rod piece with respect to the piece reaches the set rotation amount.   The blade rotates with a first axis as a rotation axis and a rotation with a second axis that intersects the first axis as a rotation axis by power generated from the drive source. The disconnector according to any one of 1 to 4.

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