JP2011223779A - Shutter device for metal-enclosed switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shutter device in which an open state of a main circuit breaking path is maintained by locking a shutter in simple configuration, and the shutter is unlocked when drawer-type electric equipment is moved to a connecting position.SOLUTION: A shutter device includes: a panel wall 2 partitioning a main circuit part and drawer-type electric equipment; a main circuit breaking path 8 fixed on the panel wall 2; a shutter 9 which covers the main circuit breaking path 8 when the drawer-type electric equipment is set at a breaking path position, and a spring flat hinge 23 for blocking movement of the shutter 9. The spring flat hinge 23 is comprised of two hinge plates 20 and 21 which are energized in an opening direction at all the time, the one hinge plate 20 is fixed to the panel wall 2, and a stopper 24 for blocking the movement of the shutter 9 is fixed to the other hinge plate 21.

Description

  The present invention relates to a shutter device for a metal closed switchgear that shields a drawer-type electrical device from a main circuit disconnection portion.

  2. Description of the Related Art Conventionally, a shutter device that shields a main circuit disconnection portion with a shutter is provided at a disconnection position where a drawer-type electrical device such as a vacuum circuit breaker is pulled out from the main circuit disconnection portion (see, for example, Patent Document 1). .

  As shown in FIG. 5, this type of shutter device is divided into a main circuit portion 3a on the right side and a drawer-type electric device portion 3b on the left side, with a board wall 2 fixed to the floor plate 1 in the middle shown in the figure. Configured.

  An upper main circuit disconnecting portion 5 obtained by molding the upper center conductor 4 with an insulating material is fixed to the panel wall 2 in the main circuit portion 3a. An upper shutter 6 to be described later is provided on the drawer-type electrical equipment unit 3b side of the upper main circuit disconnecting unit 5. A lower main circuit disconnecting portion 8 in which the lower center conductor 7 is molded with an insulating material is fixed to the panel wall 2 so as to be spaced downward in the upper main circuit disconnecting portion 5. A lower shutter 9 that operates in the same manner as the upper shutter 6 is also provided on the side of the drawer-type electrical equipment unit 3 b of the lower main circuit disconnection unit 8.

  A vacuum circuit breaker 11 on which a vacuum valve 10 is mounted is placed on the floor plate 1 in the drawer-type electrical equipment unit 3b and can be moved by wheels 12 so as to be movable. An upper main circuit conductor 13 is provided in the upper part of the vacuum valve 10, is in contact with and separated from the upper central conductor 4 in the upper main circuit disconnection part 5, and a lower main circuit conductor 14 is provided in the lower part, and the lower main circuit disconnection The lower center conductor 7 in the portion 8 can be contacted and separated.

  A guide plate 15 is fixed to the floor plate 1, and one end of the shutter link 16 is rotatably fixed by a fixing pin 17. The other end is connected to a lower shutter 9 and an upper shutter 6 that are at ground potential. Although not shown, the upper and lower shutters 6 and 9 are provided with guides for vertical movement, and attached with springs that are biased to move upward in the figure.

  Here, FIG. 5 is when the vacuum circuit breaker 11 is set to the disconnection position, and the upper and lower main circuit disconnection portions 5 and 8 are covered with the upper and lower shutters 6 and 9, respectively. When the vacuum circuit breaker 11 is moved to the connection position in the right direction in the figure, the shutter link 16 rotates clockwise with the fixing pin 17 as a fulcrum, and the upper and lower shutters 6 and 9 are respectively lowered as shown by the dotted lines in the figure. The upper and lower main circuit disconnecting portions 5 and 8 are opened and the main circuit is connected.

  On the other hand, when inspecting the inside of the upper and lower main circuit disconnecting portions 5 and 8 at the disconnecting position, the shutter link 16 is rotated in the clockwise direction, and the U-shaped locking bracket 18 is fixed to the guide plate 15. Is done. That is, the inspector fixes the shutter link 16 to the guide plate 15 with the locking metal fitting 18 and opens the upper and lower main circuit disconnecting portions 5 and 8 to perform the inspection work.

JP-A-6-269105 (Page 3, FIG. 1)

  In the above-described conventional shutter device, after the inspection work in the upper and lower main circuit disconnecting portions 5 and 8 is completed, if the forgetting to remove the latching metal 18 is forgotten, the vacuum circuit breaker 11 is caught by the latching metal 18 and connected. There is a problem that it cannot be placed. If it is forced to move, the vacuum circuit breaker 11 may fall off the floor plate 1 and be damaged.

  On the other hand, it is conceivable to add a mechanism for releasing a member such as the locking metal fitting 18 with the movement of the vacuum circuit breaker 11, but it is assumed that the number of parts increases and assembly adjustment becomes excessive. For this reason, there has been a demand for a simple configuration that can automatically release a member such as the locking metal fitting 18 as the drawer-type electrical device moves.

  The present invention has been made to solve the above-described problem. When the shutter is locked with a simple configuration to maintain the open state of the main circuit disconnection portion, and the drawer-type electrical device is moved in the connection position direction, the shutter is An object of the present invention is to provide a shutter device for a metal closed switchgear that can be unlocked.

  In order to achieve the above object, a shutter device for a metal closed switchgear according to the present invention includes a panel wall that partitions a main circuit part and a drawer-type electrical device, a main circuit disconnecting part fixed to the panel wall, When the drawer-type electrical device is in the disconnecting position, the shutter includes a shutter that covers the main circuit disconnecting portion and a spring flat hinge that prevents movement of the shutter, and the spring flat hinge is always urged in the opening direction. The hinge plate is composed of two hinge plates, one hinge plate is fixed to the panel wall, and the other hinge plate is fixed with a stopper for preventing movement of the shutter.

  According to the present invention, the shutter is locked with a simple spring flat hinge, and when the drawer-type electrical device is moved in the direction of the connection position, the lock is released in conjunction with this movement. Forgetting to remove after work can be prevented.

The principal part expansion perspective view which shows the structure of the shutter apparatus of the metal closed type switchgear which concerns on Example 1 of this invention. The principal part expansion perspective view which shows the structure of the shutter apparatus of the metal closed type switchgear which concerns on Example 2 of this invention. The principal part enlarged top view which shows the structure of the shutter apparatus of the metal closed type switchgear which concerns on Example 3 of this invention in a partial cross section. The principal part enlarged top view which shows the structure of the shutter apparatus of the metal closed type switchgear which concerns on Example 4 of this invention in a partial cross section. The side view which shows the structure of the shutter apparatus of the conventional metal closing type switchgear.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, a shutter device for a metal closed switchgear according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is an enlarged perspective view of a main part showing a configuration of a shutter device for a metal closed switchgear according to Embodiment 1 of the present invention. In FIG. 1, the same components as those in the prior art are denoted by the same reference numerals. The shutter device is the same for the upper part and the lower part, and will be described below using the lower part.

  As shown in FIG. 1, a first hinge plate 20 of a spring flat hinge 23 in which two first and second hinge plates 20 and 21 are rotatably fixed by a fixing pin 22 is provided on the panel wall 2. It is fixed with bolts. A U-shaped stopper 24 is fixed to the second hinge plate 21 with a bolt. A concave portion 25 into which the end portion of the lower shutter 9 is fitted is provided at the distal end portion of the stopper 24.

  The first and second hinge plates 20, 21 are provided with springs that are constantly urged in the opening direction as indicated by the arrows in the figure with the fixing pin 22 as a fulcrum. In addition, you may provide the spring always urged | biased by the opening direction in the exterior between the 2nd hinge board 21 and the board wall 2. FIG. The lower shutter 9 is connected to the shutter link 16.

  Here, FIG. 1 shows the disconnection position, and the lower main circuit disconnection portion 8 is opened. To achieve this state, the shutter link 16 is rotated, and the lower shutter 9 is moved downward in the figure. Then, the second hinge plate 21 is moved in the closing direction in the direction of the first hinge plate 20, and the recess 25 is fitted into the upper end of the lower shutter 9. Thereby, the lower shutter 9 can be prevented from moving in the upward direction in the figure, and the inspection work can be performed.

  After the inspection is completed, in this state, when the vacuum circuit breaker 11 is moved in the direction of the connection position, the shutter link 16 is rotated and the lower shutter 9 is moved downward in the drawing. When the lower shutter 9 is disengaged from the recess 25, the second hinge plate 21 moves in the opening direction away from the first hinge plate 20. As a result, the stopper 24 moves to the surface of the panel wall 2, and the lower shutter 9 further moves downward in the figure, and can be brought into the connection position. For this reason, it is possible to prevent forgetting to remove the latch metal as in the prior art.

  According to the shutter device of the metal closed type switchgear of the first embodiment, the shutter 9 is locked by fixing the stopper 24 to the spring flat hinge 23 that is always urged in the opening direction. When the vacuum circuit breaker 11 is moved in the direction of the connection position, the stopper 24 is detached from the shutter 9 and the shutter 9 can be unlocked.

  In the first embodiment, the pull-out type electric device has been described with the vacuum circuit breaker 11, but a disconnector, a lightning arrester, a transformer, and the like can be used as the pull-out type electric device. The spring flat hinge 23 is generally made of metal, but if it is made of an insulator, the insulation characteristics around the main circuit disconnecting portions 5 and 8 can be improved.

  Next, a shutter device for a metal closed switchgear according to a second embodiment of the present invention will be described with reference to FIG. FIG. 2 is an enlarged perspective view of the main part showing the configuration of the shutter device for the metal closed switchgear according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in that a first buffer member is provided. In FIG. 2, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 2, a first buffer member 26 made of an elastic member such as rubber is provided in the recess 25 of the stopper 24.

  According to the shutter device for the metal closed switchgear of the second embodiment, damage to the shutter 9 can be prevented by the first buffer member 26 in addition to the effects of the first embodiment.

  Next, a shutter device for a metal closed switchgear according to a third embodiment of the present invention will be described with reference to FIG. FIG. 3 is an enlarged top view of a main part of the configuration of the shutter device for the metal closed switchgear according to the third embodiment of the present invention. The third embodiment differs from the second embodiment in that second and third buffer members are provided. In FIG. 3, the same components as those in the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 3, the second and third buffer plates made of an elastic member such as rubber are provided on at least one of the second hinge plate 21 and the surface of the panel wall 2 with which the second hinge plate 21 abuts. Members 27 and 28 are provided.

  According to the shutter device of the metal closed type switchgear of the third embodiment, in addition to the effect of the second embodiment, the impact force when the second hinge plate 21 is opened is changed to the second and third buffer members 27, It can be absorbed at 28.

  Next, a shutter device for a metal closed switchgear according to a fourth embodiment of the present invention will be described with reference to FIG. FIG. 4 is an enlarged top view of a main part showing a partial cross section of the structure of the shutter device for the metal closed switchgear according to the fourth embodiment of the present invention. The fourth embodiment differs from the third embodiment in that a limit switch is provided. In FIG. 4, the same components as those in the third embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  As shown in FIG. 4, a limit switch 29 is provided on the surface of the panel wall 2 facing the stopper 24. The limit switch 29 is connected to a control unit of a metal closed switch gear (not shown).

  According to the shutter device for the metal closed switchgear of the fourth embodiment, in addition to the effects of the third embodiment, it is possible to output a signal such as during inspection work to the outside.

DESCRIPTION OF SYMBOLS 1 Floor board 2 Panel wall 3a Main circuit part 3b Draw-out type electric equipment part 4 Upper center conductor 5 Upper main circuit disconnection part 6 Upper shutter 7 Lower center conductor 8 Lower main circuit disconnection part 9 Lower shutter 10 Vacuum valve 11 Vacuum circuit breaker 12 Wheel 13 Upper main circuit conductor 14 Lower main circuit conductor 15 Guide plate 16 Shutter link 17, 22 Fixing pin 18 Locking bracket 20 First hinge plate 21 Second hinge plate 23 Spring flat hinge 24 Stopper 25 Recess 26 First buffer Member 27 second buffer member 28 third buffer member 29 limit switch

Claims (6)

A panel wall that partitions the main circuit section and the drawer-type electrical device;
A main circuit disconnection portion fixed to the panel wall;
A shutter that covers the main circuit disconnection when the drawer-type electrical device is in the disconnection position;
A spring flat hinge for preventing the movement of the shutter;
The spring flat hinge is composed of two hinge plates urged in the always opening direction,
One hinge plate is fixed to the panel wall,
A shutter device for a metal closed switchgear, wherein a stopper for preventing the movement of the shutter is fixed to the other hinge plate.   2. The metal according to claim 1, wherein when the drawer-type electrical device is in the disconnecting position, the shutter is moved to open the main circuit disconnecting portion, and the concave portion of the stopper is fitted into the shutter. Closed switchgear shutter device.   The shutter device for a metal closed switchgear according to claim 2, wherein a first buffer member is provided in the recess.   The second buffer member is provided on at least one of the panel wall surface with which the other hinge plate abuts and the other hinge plate surface. Metal closure type switchgear shutter device.   The shutter device for a metal closed switchgear according to any one of claims 1 to 4, wherein a limit switch is provided on the panel wall with which the other hinge plate abuts.   The shutter device for a metal closed switchgear according to any one of claims 1 to 5, wherein the drawer-type electrical device is a vacuum circuit breaker.

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