JPS644291B2 - - Google Patents

Description

Groove 32 guiding in the direction perpendicular to the axis A disconnector equipped with

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a disconnector, particularly to a movable contact operating mechanism.

[Conventional technology]

Conventionally, there has been a disconnector shown in FIG. 5, which is disposed, for example, on a part of the busbar of a gas insulated switchgear device. In this figure, a fixed contact 500, a shield 300, and a conductor 400 are arranged on one side of the metal container 100, and a fixed contact 50 is arranged on the other side.
Movable contact 110 that comes into contact with and separates from 0, shield 8
00 and a movable contact 700 are provided. A pin 120 is provided at one end of the movable contact 110.
One end of the link 130 is pivotally attached to the other end of the link 130 via a pin 150, and one end of a lever 140 that freely rotates around a pin 170 is pivotally attached to the other end of the link 130 via a pin 150.

Further, one end of an insulating rod 200 made of an insulating material is pivotally connected to the other end of the lever 140 via a pin 160, and the other end of the insulating rod 200 is pivotally attached to one end of the lever 220 via a pin 210. The other end of the lever 220 is pivotally supported to the metal container 100 by a pin 230. This figure shows the open state of the disconnector, and the closing operation is performed by applying an external operating force to rotate the lever 220 counterclockwise, and then disconnecting the insulating rod 20.
0 by moving the movable contact 110 to the left. In this case, when the movable contact 110 and the fixed contact 500 come into contact, the closing operation is completed. The opening operation is performed by operating each element in the opposite direction to the closing operation.

[Problem that the invention seeks to solve]

In the conventional disconnector configured in this manner, the movable contact 110 and the lever 140 are connected by pins at both ends of the link 130, and the connection portion between the link 130 and the movable contact 110 has a degree of freedom of vertical movement as shown in FIG. have. Therefore, in order to obtain stable operation of the movable contact 110, it is necessary to support the movable contact 110 with a long bearing or with two bearings (for example, bearings 900 and 901 as shown in the figure). As a result, the size of the movable contact becomes longer, and the overall length of the metal container becomes longer, resulting in an increase in the size of the device, which is disadvantageous in that it is not economical.

The present invention eliminates the conventional disadvantages by shortening the length of the movable contact in a disconnector having an insulating rod arranged perpendicular to the axial direction of the movable contact, thereby providing a more compact disconnector. The purpose is to

[Means for solving problems]

A metal container whose ends are sealed by first and second insulating spacers having a through conductor in the center and an insulating gas is sealed inside the metal container, which is provided within the metal container and is fixed to the end of the through conductor. a fixed side contact whose one end is supported by the conductor, a movable contact which is disposed removably facing the fixed side contact and movable in the axial direction, and a movable contact whose one end is fixed to the through conductor. a conductive shield formed to surround the shield; a first bearing provided at the other end of the shield to slidably support the movable contact in the axial direction; a movable contact that is provided and slidably contacts the movable contact; a movable side contact that is disposed orthogonal to the central axis of the movable contact, one end of which penetrates the shield and is rotatably supported by the shield via a second bearing; an insulating rod whose other end is rotatably supported by a part of the metal container via a third bearing and rotationally driven by an external operating mechanism, and whose one end is rotatably pivoted to one end of the movable contact. , a link with a slider pivotally supported at the other end, one end of which is pivoted at the midpoint of this link, the other end of which is fixed to one end of the insulating rod, and the distance from the pivot point to the fixed point is determined by the link. a lever set equal to the distance from the pivot point to the midpoint with the movable contact; and a lever provided on the shield so as to be orthogonal to the central axis of the movable contact and the central axis of the insulating rod, and A groove is provided for guiding the slider in a direction perpendicular to the central axes of the movable contact and the insulating rod.

[Effect]

When rotational force is transmitted to the insulating rod from the outside of the metal container, the insulating rod rotates clockwise, for example. At the same time, a lever whose one end is fixed to an insulating rod also rotates clockwise. The other end of the lever is rotatably connected to the center of the link by, for example, a pin, and similarly, one end of the link is rotatably connected to a movable contact by a pin or the like. Further, since the link has a slider implanted at the other end and is guided by a groove provided in the conductive shield, the movable contact constitutes a so-called Skotstratsu cell linear motion link mechanism and performs linear motion. When this movable contact performs a linear motion, it is electrically connected to the fixed side contact, and an electric path is established. Further, by rotating the insulating rod in the opposite direction, for example, counterclockwise, the movable contact moves linearly in the opposite direction and separates from the stationary contact, thereby interrupting the electric circuit.

〔Example〕

An embodiment of the disconnector according to the present invention will be described with reference to FIGS. 1, 2, 3, and 4. In FIG. 1, an electrically grounded metal container 1 is sealed at both ends with first and second insulating spacers 2a and 2b having through conductors 6a and 6b in the center, and is filled with an insulating high pressure gas (for example, SF ₆ gas, etc.) is sealed. A shield 3 and a conductor 4 are connected to the through conductor 6a.
is fixed, and a fixed side contact 5 is attached to the tip of this conductor 4.
is supported at one end. One end of a conductive shield 8 formed to surround a movable contact (described later) is fixed to the through conductor 6b, and a first bearing 9 that slidably supports a movable contact 11 is attached to the tip side of the shield. A movable side contactor 7 that comes into sliding contact with the contact 11 is provided. In addition, both shields 8 and 3 have movable contacts 11, respectively.
openings 8a and 3a so as not to impede the linear movement of
is provided. One end 1 of the movable contact 11
1a is connected to a link 28, and the link 28 is connected to the insulating rod 20 via a lever 25. One end 20a of the insulating rod 20 is rotatably supported by a second bearing 37 provided on the shield 8, and the other end 20c is supported by a bearing portion 4 provided below the metal container 1.
It is rotatably supported by 1 and 42. 2 and 3 are partial cross-sectional views taken along the line AA in FIG. 1, showing an open state and a closed state, respectively. In these figures, link 28 has one end connected to pin 27.
The middle point of the movable contact is pivotally connected to the lever 25 by a pin 29 at one end 11a of the movable contact. A slider 31 is pivotally supported at the other end of the link 28. The distance between the insulating rod 20 and the pin 29 is here chosen equal to the distance between the pins 29 and 27. The lever 25 is fixed to, for example, a hexagonal insulating rod tip 20b so as to freely rotate in the direction of the arrow in response to the rotation of the insulating rod 20 about its axis. Next, FIG. 4 is a sectional view taken along the line BB in FIG. 3, and explains the vicinity of the roller 31 in detail. In this figure,
The slider 31 consists of two rollers 31a and 31b connected by a pin 30, and moves up and down in a groove 32 provided in a part of the shield 8 in FIGS. 2 and 3. That is, the groove 32 guides the slider 31 in a direction perpendicular to the axial directions of the movable contact 11 and the insulating rod 20.

This roller mechanism, link 28, lever 2
5. The movable contact end portion 11a constitutes a so-called Scott Stratssel linear motion link mechanism.

Next, the operation of this embodiment will be explained with reference to the drawings. FIGS. 1 and 2 show the disconnection state of the disconnector, and closing is performed by rotating the insulating rod 20. FIG. That is, when the insulating rod 20 is rotated in the direction of the arrow in FIG. 1 by an external operating force, the rotational force is transmitted to the link 28 through the tip 20b of the insulating rod 20. In response to this force, the link 28 moves the movable contact 11 in the direction of the arrow in FIG.
and at the same time move the roller 31 along the groove 32.
Move a and 31b up and down. When the insulating rod 20 is rotated 90 degrees, the movable contact 11 reaches the position shown in FIG. 3, and its tip comes into contact with the fixed current-carrying contact 5, thereby completing the closing operation. Note that the rollers 31a and 31b have descended again and have reached their original positions. Further, the opening operation is performed by moving each component in the opposite direction of the closing operation.

〔Effect of the invention〕

As described above, according to the present invention, since the pin 27 at one end of the link 28 moves along an extension of the axial center line of the movable contact 11, the length of the movable contact can be easily covered by the bearing portion of the movable contact 11 at one location. Can be shortened. Therefore, the weight of the movable part can be reduced, and the disconnector can be made smaller.

Furthermore, the structure is such that the operating force is transmitted to the movable contact 11 by rotating the insulating rod 20, and since the movable contact 11 can be made lighter, it also has the effect of reducing the operating force.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a disconnector according to the present invention, and FIGS. 2 and 3 are sectional views taken along the line A--A in FIG. , FIG. 4 is a partial sectional view taken along line BB in FIG. 3, and FIG. 5 is an end view showing an example of a conventional disconnector. In the figure, 1 is a metal container, 5 is a fixed contact, 7 is a movable contact, 8 is a conductive shield, 9 is a first bearing, 11 is a movable contact, 19 is a movable contact, and 20 is an insulating rod. , 25 is a lever, 28 is a link, 31 is a slider, 32 is a groove, 37 is a second bearing, and 41 and 42 are third bearings.

Claims (1)

[Scope of Claims] 1. A metal container 1 whose ends are sealed by first and second insulating spacers 2a and 2b having through conductors 6a and 6b at the center, and an insulating gas is sealed inside the metal container. 1, and the through conductor 6
a fixed side contact 5 whose one end is supported by a conductor 4 fixed to the end of a; a movable contact 11 disposed removably facing the fixed side contact 5 and movable in the axial direction; A conductive shield 8 has one end fixed to the through conductor 6b and is formed to surround the movable contact 11. A conductive shield 8 is provided at the other end of the shield 8 and supports the movable contact 11 slidably in the axial direction. 1
A bearing 9 is provided on the shield 8 adjacent to the first bearing 9, and a movable contact 7 is provided in sliding contact with the movable contact 11. It penetrates the shield 8 and is rotatably supported by the shield 8 via a second bearing 37, and the other end is attached to a part of the metal container 1 with a third bearing 4.
An insulating rod 20 is rotatably supported via 1 and 42 and rotationally driven by an external operating mechanism; One end is pivotally connected to the center point of this link 28, and the other end is fixed to one end 20a of the insulating rod 20, and the distance from the pivot point to the fixed point is determined by the movement of the link 28. A lever 25 is set equal to the distance from the pivot point to the center point with the contact 11, and the movable contact 1 is attached to the shield 8.
1 and the central axis of the insulating rod 20, and the slider 31 of the link 28
the center of the movable contact 11 and the insulating rod 20