JPH0126029Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention fixes a support insulator provided with a fixed electrode portion with or without an arc extinguishing device on a mounting base, and a support insulator to which a current limiting fuse is removably attached. The present invention also relates to a pneumatic switch with a current limiting fuse in which a movable blade corresponding to the fixed electrode portion of the support insulator is rotatably supported on the support insulator so as to be able to approach and separate from the fixed electrode portion of the support insulator.

Conventional technology In air switchgears with current-limiting fuses, two bases were conventionally provided for attaching and fixing the power source side and load side supporting insulators to correspond to each insulator, which increased the size and number of parts. This has hindered the miniaturization and simplification of switches.

Purpose The purpose of this invention is to form a mounting base in one location into a mountain shape, with an upper support insulator fixed on one slanted mounting surface and a lower support insulator fixed on the other slope. With a current-limiting fuse, the switch can be made smaller and simpler by mounting both support insulators in a V-shape and rotatably supporting the movable contact on the side of the load-side support insulator. The purpose of the present invention is to provide an air switch.

An embodiment of this current limiting fuse pneumatic switch will be described below with reference to Figs. 1 to 3. As shown in Figs. 1 and 3, the front surface as the mounting surface is shaped like a mountain. A mounting base 1 bent to protrude is bolted between a pair of left and right fixed frames 2 and 3, and an upper support as a power supply side support insulator is provided for each phase on the upwardly slanted surface of the mountain-shaped portion. The insulator 4 is bolted to the base end, and the downwardly inclined surface of the mountain-shaped portion is slightly shifted to the right in FIG. A lower support insulator 5 serving as a load side support insulator for each phase is bolted to the base end.

An arc extinguishing chamber 6 is fixed at the tip of the upper support insulator 4, and a fixed contact 7 as a fixed electrode is disposed inside the arc extinguishing chamber 6. A power supply side terminal 8 led out upward from the arc extinguishing chamber 6 is connected. Further, a fuse holder portion 9 is integrally formed at the tip of the lower support insulator 5, and upper and lower fuse carriers 10 and 11 are separately fixed to the upper and lower ends of the holder portion 9, respectively. A protrusion 9a is protruded from one side of the central part of the holder part 9, and a movable contact 12 as a movable blade that can move toward and away from the fixed contact 7 is rotatable at the lower end of the protrusion 9a. It is movably supported on a shaft 16. A conductive plate 13 for connecting to the movable contact 12 is connected and fixed to the upper fuse carrier 10, and a load side connection terminal 14 led out downward is connected and fixed to the lower fuse carrier 11. ing.

At the upper end of the fuse holder section 9, a driven lever 15 having an L-shaped side surface is rotatably supported at the center, and between the fuse carriers 10 and 11 is located on the lower surface of the center of the lower half of the driven lever 15. Receiving part 1 for receiving the protrusion of a blowout indicator (not shown) of a connected current limiting fuse (not shown)
8 is recessed. And that driven lever 1
One end of a connecting rod 19 constituting a part of the open-phase prevention drive mechanism is fixed to the upper end of 5, and when the driven lever 15 is rotated in response to the protruding operation of the fusing display device (not shown). Each movable contactor 12 is opened simultaneously via an open-phase prevention drive mechanism.

Further, one end of a push-up rod 20 made of an insulating material such as synthetic resin and constituting a part of the opening/closing mechanism is rotatably attached to the center of the movable contactor 12.

Note that 22 is an opening/closing handle for external operation that is rotatably supported by a shaft 21 on the fixed frame 3 and is linked to the opening/closing mechanism.

Now, in the air switch with current limiting fuse as described above, since the front surface of the mounting base 1 is formed in a mountain shape, the upper and lower support insulators can be supported in a V-shape. Therefore, the vertical width of the mounting base can be reduced, and the size of the mounting base can be reduced. Furthermore, the area of the mounting portion can also be reduced.

Further, there is no need to provide separate mounting bases for the upper and lower insulators as in the conventional case, and the number of parts can be reduced and the switch can be simplified.

In addition, the lower support insulator is shifted to the right from the upper support insulator and fixed to the mounting base 1, and the movable contact 12 is rotatably supported on the shaft 16 on the side thereof, so that the shaft 16 and the fixed contact The distance between the contacts 7 is shortened, and therefore the movable contact 12 can be made smaller. As a result, the height of the movable contactor 12 that has been opened can be lowered from the mounting base 1. Furthermore, the arc shape of the contact portion 12a at the tip of the movable contact 12 that contacts the fixed contact 7 can be made into a gentle curve, thereby allowing the opening of the arc extinguishing chamber 6 inserted into the contact portion 12a to be moved upward and downward. There is no need to widen the arc extinguishing chamber 6 in the direction, and the arc extinguishing chamber 6 can be made compact.

Note that this invention is not limited to the above-mentioned embodiments, and may be modified as desired without departing from the spirit of this invention, such as shifting the load side support insulator to the left with respect to the power supply side support insulator and fixing it to the mounting surface. It is also possible to change to

Effects As detailed above, this idea consists of fixing an upper support insulator with a fixed electrode part on one slope of a mounting base formed in a mountain shape, and a lower support insulator on the other slope. A fuse support base is fixedly installed in a V-shape with the upper support insulator, and a fuse support base for removably attaching a current limiting fuse is attached to the tip of the lower support insulator. The distal end of the movable blade, which is rotatably pivoted at its end to a protrusion integrally protruding from one side of the fuse support base, is mounted at the same angle as the upper part of the fuse support base. By arranging it so that it can come into contact with and separate from the fixed electrode portion provided on the support insulator, the following unique effects can be achieved.

(b) By simply providing one mounting base, it is possible to support both the upper and lower supporting insulators by using its mountain-shaped slope, making the structure of the base end of both supporting insulators of the switch more compact, and further improving air switching. The device can be simplified.

(b) By arranging the fuse support stand so as to be perpendicular to the lower support insulator which is arranged at an angle with respect to the mounting base, the fuse support stand has the same slope as the lower support insulator mounting surface, which is different from the conventional fuse support stand. The distance between the upper end of the fuse support and the fixed electrode can be made larger than when the lower end is mounted with the lower end lowered, and the fuse support can be placed almost within the opening range of both supporting insulators, making the air switch more compact. be able to.

(c) Furthermore, since the movable blade is provided on one side of the fuse support base, the movable blade can also be placed within the opening range of both supporting insulators.

[Brief explanation of the drawing]

FIG. 1 is a side view showing an embodiment embodying this invention, FIG. 2 is a front view, and FIG. 3 is a perspective view showing a mounting base and a fixed frame. Mounting base...1, Upper support insulator...4, Lower support insulator...5, Fixed electrode part (fixed contact)...
7. Fuse support stand...9, Projection...9a, Movable blade (movable contact)...12.

Claims (1)

[Claims for Utility Model Registration] An upper support insulator 4 having a fixed electrode portion 7 is fixedly installed on one slope of a mounting base 1 formed in a mountain shape, and a lower support insulator 5 is installed on the other slope. A fuse support base 9 is fixed to the upper support insulator 4 in a V-shape, and at the tip of the lower support insulator 5 is a fuse support base 9 for removably attaching a current limiting fuse.
is mounted so as to be inclined at the same slope as the slope to which the lower support insulator 5 is fixed, and is rotatable at its end relative to a protrusion 9a integrally provided on one side of the fuse support base 9. 2. A current limiting fuse equipped air switch, characterized in that a tip end of a movable blade 12 which is pivoted on the upper support insulator 4 is arranged so as to be able to come into contact with and separate from the fixed electrode part 7 provided on the upper support insulator 4.