JP2019046701A - Vacuum switching device - Google Patents

Abstract

To suppress an increase in size of a high voltage apparatus box while ensuring insulation between the high voltage apparatus box and a vacuum switch housed at the inside of the high voltage apparatus box.SOLUTION: A vacuum swathing device houses therein: a vacuum switch including a fixed contact and a movable contact to be electrically connected to an external circuit, in a high voltage apparatus box having a rectangular cross section and composed of a plurality of inner walls; and a grounding device to be turned on and off with the fixed contact and the movable contact of the vacuum switch. A fixed contact and a movable contact of the vacuum switch are located at an equal distance from the inner walls at two places in proximity to each other of the high voltage apparatus box.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vacuum switching device, and more particularly to a vacuum switching device suitable for use in a railway vehicle or the like in which a vacuum switch is housed in a high pressure equipment box.

  Generally, a vacuum switching device mounted on a railway vehicle is disposed on the roof or floor of the railway vehicle. In particular, the vacuum switch must be installed in consideration of insulation with its peripheral equipment, for example, the vacuum switch mounted on a railway vehicle is housed in a box called a high pressure equipment box, By setting the high voltage equipment box to the ground potential, the vacuum switch is electrically isolated and insulation from the peripheral equipment is secured.

  As a vacuum switching device mounted on a railway vehicle, for example, there is one described in Patent Document 1.

  In this patent document 1, a vacuum switching device mounted on a railway vehicle operates a vacuum circuit breaker (vacuum switch), a grounding device which rotates about a rotation axis, and an electrode and grounding device of the vacuum circuit breaker. In the maintenance work of the vacuum switchgear, contact the contact exposed from the vacuum circuit breaker by rotating the grounding device, and set the vacuum circuit breaker to the ground potential for safety. It is stated that the work can be done.

China Utility Model No. 202268283 Specification

  However, in the case of the vacuum switchgear described in Patent Document 1, assuming that the periphery of the vacuum circuit breaker is covered with a high voltage equipment box having a ground potential, the contact that is the charging portion of the vacuum circuit breaker extends in the lower left direction (See Fig. 3 of Patent Document 1), the insulation distance between the contacts of the vacuum circuit breaker and the upper inner wall of the high voltage equipment box can be easily secured, but the contacts of the vacuum circuit breaker and the lower inner wall of the high pressure equipment box In order to secure the insulation distance, it is necessary to increase the size of the high-pressure equipment box. If the size of the high-pressure equipment box is increased, there is a problem that the internal space of the railway vehicle is compressed. The

  The present invention has been made in view of the above-described point, and the object of the present invention is to increase the size of the high-pressure equipment box while securing the insulation between the high-pressure equipment box and the vacuum switch housed therein. Not to provide a vacuum switching device.

  In order to achieve the above object, the vacuum switch according to the present invention is a fixed contact for electrically connecting with an external circuit in a high voltage equipment box which has a rectangular cross section and is formed of a plurality of inner walls. And a vacuum switch provided with a movable contact, and a grounding device accommodated in the vacuum switch and the fixed contact and the movable contact of the vacuum switch housed therein, wherein the fixed contact and the movable contact of the vacuum switch are The invention is characterized in that they are located at equal distances from the two adjacent inner walls of the high pressure equipment box.

  According to the present invention, it is possible to obtain a vacuum switching device which does not increase the size of the high-pressure equipment box while securing the insulation between the high-pressure equipment box and the vacuum switch housed therein.

It is a schematic block diagram which shows the vacuum switch in Example 1 of the vacuum switch of this invention. It is a longitudinal cross-sectional view which shows apparatus arrangement | positioning of the state in which the vacuum switch was accommodated in the high voltage | pressure apparatus box in Example 1 of the vacuum switching device of this invention. It is a cross-sectional view which shows the vacuum switching apparatus in case the earthing | grounding apparatus is a cutting | disconnection position in Example 1 of the vacuum switching apparatus of this invention. It is a cross-sectional view which shows the vacuum switching apparatus in case the earthing | grounding apparatus is in an entering position in Example 1 of the vacuum switching apparatus of this invention.

  Hereinafter, the vacuum switching device of the present invention will be described based on the illustrated embodiment. In the drawings, the same reference numerals are used for the same components.

  EXAMPLE 1 The vacuum switch in Example 1 of the vacuum switch of this invention is shown in FIG.

  As shown in FIG. 1, the vacuum switch 1 includes a fixed electrode 4, a movable electrode 5 in contact with or separated from the fixed electrode 4, and an arc shield 6 covering the fixed electrode 4 and the periphery of the movable electrode 5. The vacuum valve 2 comprises a cylindrical ceramic insulating cylinder 7 constituting a part of an outer container supporting the arc shield 6 and a bellows 8 or the like.

  The outer container of the vacuum valve 2 is configured such that the ends of the ceramic insulating cylinder 7 are covered with end plates, and the inside is maintained in a vacuum state. The fixed electrode 4 is connected to a fixed conductor 10, and the fixed conductor 10 is provided with a fixed contact 13 which is drawn out of the vacuum valve 2 and connected to an external electric circuit. The movable electrode 5 is connected to the movable conductor 11, and the movable conductor 11 is drawn out of the vacuum valve 2 and electrically connected to the movable side lead conductors 12A and 12B through the current collector 22, and the movable side At the ends of the lead conductors 12A and 12B, movable contacts 14A and 14B connected to an external electric circuit are provided.

  The vacuum valve 2, the fixed conductor 10, the movable conductor 11, and the movable side lead conductors 12A and 12B are covered with an insulating case 3 made of a solid insulator such as epoxy resin or rubber resin. On the movable side of the vacuum valve 2, the bellows 8 is disposed between the movable conductor 11 and the movable end plate, and the movable conductor 11 can be moved while maintaining the vacuum state of the vacuum valve 2.

  Further, an air insulation operation rod 15 is connected to the movable side of the vacuum valve 2. One end of a link mechanism 16 is connected to the tip of the air-insulated operation rod 15, and the operation unit 17 is connected to the other end of the link mechanism 16. The force generated by the operation unit 17 is transmitted via the link mechanism 16. It is transmitted to the air insulation operation rod 15. The driving force of the operating device 17 described above is generated from a spring operating device using a spring or an electromagnetic operating device using a permanent magnet and a coil, but the detailed description of the operating device is omitted.

  Next, the configuration of the vacuum switching device 100 of the present invention in which the above-described vacuum switch 1 is housed in the high-pressure equipment box 31 will be described with reference to FIGS. 2, 3 and 4.

  FIG. 2 is a longitudinal sectional view showing the device arrangement of the vacuum switching device 100 in a state in which the vacuum switch 1 is housed in the high pressure device box 31. As shown in FIG.

  As shown in FIG. 2, in the vacuum opening and closing apparatus 100 of the present embodiment, the high pressure equipment box 31 has a rectangular cross section, and the high pressure equipment box upper inner wall 51, high pressure equipment box lower inner wall 52, high pressure equipment box left inner wall 53 The high-pressure equipment box right inner wall 54, the high-pressure equipment box front-side inner wall 55 described later, and the high-pressure equipment box rear-side inner wall 56 are installed in the high pressure equipment box 31 A vacuum switch 1 is installed on the controller box 18.

  The electric circuit in the high voltage equipment box 31 mentioned above is opened and closed via the instrument transformer 35 in which the cable head 32A fixed to the high pressure equipment box upper inner wall 51 is also fixed to the high pressure equipment box upper inner wall 51 The fixed conductor 10 is connected to the movable contacts 14A and 14B via the movable conductor 11 (see FIG. 1) of the vacuum switch 1. The movable contact 14B is connected to the cable head 32B fixed to the high pressure equipment box lower side inner wall 52, and electricity can be supplied from the cable head 32B to the external circuit of the high pressure equipment box 31.

  Furthermore, the movable contact 14B is connected to the cable head 32C fixed to the high pressure equipment box upper inner wall 51 via the disconnector 33 fixed to the high pressure equipment box lower inner wall 52, from this cable head 32C to the high pressure equipment Electricity can be supplied to the external circuit of the box 31.

  Moreover, the lightning arrester 34 fixed to the high voltage | pressure equipment box upper side inner wall 51 is connected to the cable head 32C, This lightning arrester 34 has a role which protects an electric circuit from a lightning surge.

  Further, a grounding device 19 is installed adjacent to the vacuum switch 1 and the high-voltage device box 31 in the longitudinal direction on the controller box 18 installed on the lower high-pressure device box lower inner wall 52 of the vacuum switch 1. ing. The grounding device 19 is connected to the rotary shaft 21 via a cam mechanism 23 connected to the operating unit 17 to which the other end of the link mechanism 16 described above is connected in the operating unit box 18.

  Then, when a worker performs maintenance work, etc., the moving direction of the power transmitted from the operation device 17 is converted by the cam mechanism 23 and the grounding device 19 is rotated about the rotating shaft 21 to fix the fixed contact 13 and the grounding device. By bringing the first clip 20A provided at the tip of the 19 into contact with the second clip 20B provided between the movable contact 14A and the grounding device 19, the electric circuit in the high voltage equipment box 31 is obtained. The ground potential makes it possible to work safely.

  FIG. 3 is a cross-sectional view of the vacuum switching device 100 when the grounding device 19 is in the off position (the fixed contact 13 and the first clip 20A, the movable contact 14A and the second clip 20B are not in contact). FIG. 4 is a cross-sectional view of the vacuum switching device 100 when the grounding device 19 is in the entering position (in which the fixed contact 13 and the first clip 20A, the movable contact 14A and the second clip 20B are in contact). .

  As shown in FIGS. 3 and 4, the fixed contact 13 and the movable contacts 14A and 14B serving as the charging part pass through the center of the cylindrical vacuum switch 1 and extend in the longitudinal direction of the high-pressure equipment box 31 (left and right direction in FIG. 3). The rotary shaft 21 of the grounding device 19 is disposed on the X 'axis parallel to the longitudinal direction (left and right direction in the figure) of the high-pressure equipment box 31 below the X axis. The periphery of the unit 1, the grounding device 19, and the controller box 18 is covered with a high voltage equipment box 31 which is at a ground potential.

  At this time, in the present embodiment, the fixed contact 13 and the fixed contact 13 which are distances ensuring the insulation between the fixed contact 13 and the movable contacts 14A and 14B and the inner wall 55 near the high voltage device box and the inner wall 56 behind the high voltage device box When the distance between the movable contacts 14A and 14B and the high-pressure equipment box inner wall 56 is L1, and the distance between the fixed contact 13 and the movable contacts 14A and 14B and the high-pressure equipment box front wall 55 is L2, L1 The positions of the vacuum switch 1 and the high-pressure equipment box 31 are determined so that L2 = L2.

  By thus determining the positions of the vacuum switch 1 and the high-pressure equipment box 31, it is possible to minimize the distance L = L1 + L2 from the high-pressure equipment box front side inner wall 55 to the high-pressure equipment box rear side inner wall 56, While ensuring the insulation between the high pressure equipment box 31 and the vacuum switch 1 accommodated therein, it is possible to reduce the size of the high pressure equipment box, that is, to prevent the high pressure equipment box 31 from being enlarged.

  That is, in the case where the above-mentioned distance is L1 (L2 (however, the distance of L is constant), there is no problem as long as L1 and L2 can ensure insulation.

  However, assuming that L1> L2, if the insulation of L2 can not be ensured, an additional insulation distance α is required, and the distance from the high pressure equipment box front side inner wall 55 to the high pressure equipment box rear side inner wall 56 Since L1 + L2 + α = L + α, and the size of the high-pressure equipment box 31 increases (increases in size) by the amount of α, it is not preferable. Therefore, the arrangement of the high pressure equipment box 31 and the vacuum switch 1 shown in FIGS. 3 and 4 is preferable.

  In FIG. 3, when the grounding device 19 is in the off position (the fixed contact 13 and the first clip 20A, the movable contact 14A and the second clip 20B are not in contact), the fixed contact 13 and the movable contact serving as a charging unit Insulation must be secured between 14A and the first and second clips 20A and 20B of the grounding device 19 at the ground potential.

  Further, in FIG. 3 and FIG. 4, the grounding device 19 in the off position is arranged to be accommodated in the upper range of the controller box 18 from the viewpoint of reducing the size of the high-pressure equipment box 31. Specifically, at the upper part of the operation box 18, the position at the most distance from the fixed contact 13 and the movable contact 14A of the vacuum switch 1 is the point A which is the corner of the operation box 18, so the grounding device When 19 is in the cut position, it is preferable to arrange its tip near the corner of the controller box 18 which is the point A, in order to secure the insulation distance.

  However, the tip of the grounding device 19 (the first and second clips 20A and 20B) does not have to be strictly at the point A, and the X axis operates with the point B at the tip of the fixed contact 13 and the movable contact 14A. By placing the tip of the grounding device 19 outside the circumference described by the point C which is the intersection of the ends of the instrument box 18 and in the upper area of the manipulator box 18, at the top of the instrument box 18, It becomes easy to secure the distance between the fixed contact 13 and the movable contact 14A of the vacuum switch 1 and the grounding device 19.

  Furthermore, the grounding device 19 is at the turning-on position from the cutting position with the rotary shaft 21 at the center (in a state where the fixed contact 13 and the first clip 20A, the movable contact 14A and the second clip 20B are in contact) It is preferable to arrange the grounding device 19 so that the trajectories of the first and second clips 20A and 20B when moving to the cutting position can be accommodated at the top of the controller box 18.

  By adopting the configuration of the present embodiment as described above, while securing the necessary insulation distance between the grounding device 19 and the first and second clips 20A and 20B and the fixed contact 13 and the movable contact 14A, When the device 19 is in the off position or when operating between the off position and the on position, the grounding device 19 can be prevented from interfering with the inner wall of the high pressure equipment box, and the high pressure equipment box 31 can be enlarged. It is possible to prevent.

  The above embodiments are described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Also, part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. In addition, with respect to a part of the configuration of each embodiment, it is possible to add, delete, and replace other configurations.

  DESCRIPTION OF SYMBOLS 1 ... Vacuum switch, 2 ... Vacuum valve, 3 ... Insulating case, 4 ... Fixed electrode, 5 ... Movable electrode, 6 ... Arc shield, 7 ... Ceramic insulation cylinder, 8 ... Bellows, 10 ... Fixed conductor, 11 ... Movable conductor , 12A, 12B: movable side drawn conductor, 13: fixed contact, 14A, 14B: movable contact, 15: air insulation operating rod, 16: link mechanism, 17: controller, 18: controller box, 19: grounding device 20A: first clip, 20B: second clip, 21: rotary shaft, 22: current collector, 23: cam mechanism, 31: high-pressure equipment box, 32A, 32B, 32C: cable head, 33: disconnector, 34: Lightning arrester, 35: Instrument transformer, 51: High pressure equipment box upper inner wall, 52: High pressure equipment box lower inner wall, 53: High pressure equipment box left inner wall, 54: High pressure equipment box right inner wall, 55: High pressure equipment box Side inner wall, 56 ... high Equipment box rear side inner wall 100 ... vacuum switchgear.

Claims (11)

A vacuum switch comprising a fixed contact and a movable contact for electrically connecting to an external circuit in a high voltage equipment box having a rectangular cross section and being constituted by a plurality of inner walls, and the fixing of the vacuum switch What is claimed is: 1. A vacuum switching device containing a grounding device which is turned on and off with a contact and a movable contact, comprising:
The vacuum switchgear according to claim 1, wherein the fixed contact and the movable contact of the vacuum switch are located at equal distances from the two adjacent inner walls of the high-pressure equipment box. The vacuum switching device according to claim 1, wherein
The vacuum switching device is characterized in that the fixed contact and the movable contact of the vacuum switch are disposed on an X axis parallel to the longitudinal direction of the high-pressure equipment box, passing through the center of the cylindrical vacuum switch. . The vacuum switching device according to claim 1 or 2, wherein
The vacuum switching device comprises a high pressure equipment box upper inner wall, a high pressure equipment box lower inner wall, a high pressure equipment box left inner wall, a high pressure equipment box right inner wall, a high pressure equipment box front side inner wall, and a high pressure equipment box inner wall.
When the distance between the fixed contact and the movable contact and the inner wall of the high voltage apparatus box is L1, and the distance between the fixed contact and the movable contact and the inner wall of the high voltage apparatus box is L2, L1 The vacuum switchgear characterized in that the vacuum switch and the high-pressure equipment box are positioned so that L2 = L2. The vacuum switching device according to claim 3, wherein
In the high-voltage equipment box, a controller for operating the vacuum switch and the grounding device is housed and installed in the controller box. The vacuum switching device according to claim 4, wherein
The vacuum switchgear according to claim 1, wherein the vacuum switch and the grounding device are disposed on the controller box and adjacent to each other in the longitudinal direction of the high-pressure equipment box. The vacuum switching device according to claim 4 or 5, wherein
The operating device is connected to the other end of the link mechanism whose one end is connected to the insulated operating rod connected to the movable side of the vacuum switch, and the other end of the link mechanism is connected to the grounding device A vacuum switching device characterized in that it is rotatably connected to a rotating shaft via a cam mechanism connected to the connected operating device. The vacuum switching device according to claim 6, wherein
The movement direction of the power transmitted from the operation device is converted by the cam mechanism, the grounding device is rotated about the rotating shaft, and the first contact provided at the fixed contact and the tip of the grounding device is A vacuum switching device characterized in that the electric circuit in the high voltage equipment box is set to the ground potential by bringing the second contact provided between the movable contact and the grounding device into contact with each other. The vacuum switching device according to claim 7, wherein
The vacuum switchgear according to claim 1, wherein the grounding device in the off position is arranged to fit within the upper area of the controller box. The vacuum switching device according to claim 7, wherein
The vacuum switchgear according to claim 1, wherein the grounding device in the cutting position is arranged such that a tip of the grounding device is at a corner of the controller box. The vacuum switching device according to claim 8, wherein
The controller box outside the circumference described by the point C which is the intersection of the X axis and the end of the controller box around the center point B of the fixed contact of the vacuum switch and the tip of the movable contact The tip of the grounding device is disposed in the upper area of the vacuum switch. The vacuum switching device according to claim 7, wherein
In the grounding device, the track of the first and second clips when the grounding device moves from the cutting position to the on position or from the entering position to the cutting position around the rotation axis is the upper portion of the operator box A vacuum switching device characterized in that it is arranged to fit within.

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