JPS61284014A - Three-phase package operation type gas insulation equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a three-phase collectively operated gas insulated device.

Three-phase all-operated type, insulated equipment For example, three-phase all-operated type gas circuit breakers have a simple structure and excellent breaking performance, but on the other hand, they extinguish the arc by spraying arc-extinguishing gas at the same time as the breaking operation. Relatively large operating force is required. For this reason, efforts are always being made to reduce the operating force.

FIG. 4 shows a conventional example of a three-phase collectively operated puffer type gas circuit breaker. As shown in the figure, a three-phase batch operated puffer type gas circuit breaker is filled with arc-extinguishing gas.
Fixed contacts 2 are placed in three containers 1 placed at predetermined positions.
．． Movable contact 3. Insulated nozzle 4. Buffer cylinder5.
A buffer-type cut-off section 9 composed of a piston 6, an insulated support tube 7, and an insulated operating rod 8 is housed. Of this blocking part 9, the fixed contact 2 forms a fixed part, and the movable contact 3. Insulated nozzle 4. The buffer cylinder 5 and the insulated operating rod 8 form a movable part. The insulated operating rod 8 is connected to a hinge 14 disposed substantially coaxially with an operating piston 13 of an operating device 12 via a gas seal lever 11 that has a gas seal portion, that is, a shaft portion 10 sealed with gas.
They are respectively connected to rods 15 that connect the respective phases. In the same figure, 16 is a spring for closing operation, 17 is a braking device, 18 is a bushing, and 19 is a pedestal, which is attached to the container 1 described above.
is fixed to a fixed part, for example, a pedestal 19.

In the three-phase collectively operated Puffer type gas circuit breaker constructed as described above, the movable part thereof is operated by an operating device. That is, the hinge 14 of the operating movable part connects the operating device 12 and the movable parts of each phase. The rod 15 is linearly driven by the operating piston 13. The direction of this linear motion is changed by the gas seal levers 11 arranged in each phase, and the buffer cylinder 5. Movable contact 3. Insulated nozzle 4
to drive. Buffer cylinder 5 and buffer piston 6
The arc-extinguishing gas in the buffer chamber 20 surrounded by
Along with the breaking operation, an arc is generated between the fixed and movable contacts 2 and 30. This arc is extinguished by the action of the high-pressure gas spray guided by the insulating nozzle 4, and the circuit is interrupted.

By the way, the magnitude of the operating force of a buffer type gas circuit breaker is determined by the buffer reaction force generated when the pressure in the buffer chamber 20 increases, the weight of the operating movable part and the movable part of the interrupting part 9, and the amount required to interrupt one circuit. It is determined in relation to the interrupting operating characteristics. For this reason, one method for ensuring the required interrupting operation characteristics and reducing the operating force is to reduce the weight of these movable parts. However, the hinge 14, which is a movable part for operation. Since the dimensions and shapes of the rods 15 and the like are determined from the viewpoint of mechanical strength based on the magnitude of the load applied to them during operation and the material, a significant reduction in their weight cannot be expected. However, it is desired to develop an operating mechanism that can further reduce the weight of the operating movable section, which has a greater effect than the movable section of the cutoff section 9. Regarding this, Japanese Patent Application Laid-Open No. 58-1024
There is a publication No. 23.

[Purpose of the invention]

The present invention has been made in view of the above points.

The object of the present invention is to provide a three-phase collectively operated gas insulated device that can reduce the weight of the operating movable part of the operating device and reduce the operating force.

[Summary of the invention]

That is, the present invention includes a plurality of cut-off parts each having a fixed part with a fixed contact and a movable part with a movable contact, and a plurality of cut-off parts that are fixed to the fixed part and filled with arc-extinguishing gas. an operating device, the movable parts of the plurality of shutoff parts being provided in the container and having an operating device from outside the container through a gas seal part connected to an insulated operating rod of the movable part; In a three-phase collectively operated gas insulated device that is simultaneously operated in a three-phase collectively operated gas insulated device, the operating device is connected to the gas seal portion via a connecting rod and a connecting lever,
and a rotating shaft whose at least both ends are rotatably supported by the fixed portion; and an operation control rod connecting the rotating shaft and the operating device.

It is characterized by comprising a spiral spring having one end fixed to the rotating shaft and the other end fixed to the fixed part, and a braking device provided on the rotating shaft, whereby the blocking portion The movable part is driven by the rotational movement of a rotating shaft to which rotational force is applied directly by a thin coil spring.

[Embodiments of the invention]

The present invention will be explained below based on an embodiment shown in one figure. An embodiment of the invention is shown in FIGS. 1 and 2. FIG. Note that parts that are the same as those in the conventional system are given the same reference numerals, and therefore their explanations will be omitted. In this embodiment, the operating device t includes a rotating shaft 23 connected to the gas seal lever 11 of the gas seal portion via a connecting rod 21 and a connecting lever 22, and rotatably supporting at least both ends of the rotating shaft 23; and an operation control rod 24 that connects the and an operation device (not shown);
It is composed of a thin coil spring 26 whose one end is fixed to the rotating shaft 23 and whose other end is fixed to a fixed part such as a case 25, and a braking device 27 provided on the rotating shaft 23. By doing so, the operating device includes a rotating shaft 23 that is connected to the gas seal lever 11 via the connecting rod 21 and the connecting lever 22 and rotatably supports at least both ends of the rotating shaft 23. An operation control rod 24 is connected between the controller and the operating device, and a thin coil spring 26 has one end fixed to the one-rotation shaft 23 and the other end fixed to the case 25.
and a braking device 27 provided on the rotating shaft 23, so that the movable part of the blocking part 9 is driven by the rotational movement of the rotating shaft 23 to which rotational force is directly applied by the thin coil spring 26. Thus, it is possible to obtain a three-phase collectively operated puffer type gas circuit breaker that can reduce the weight of the operating movable part of the operating device and reduce the operating force.

That is, the bearings 29, 30 fixed to the frame 28 are rotatably supported by the bearings 29, 30, and the connecting lever 22. A rotating shaft 23 to which operating levers 31, 32, 33 are fixed. This rotary shaft 23 was provided with a spiral spring 26, which was supported at one end by the operating lever 31 and the other end by the case 25 and disposed compulsively with the rotary shaft 23, but two thinly wound springs 26 were provided in relation to each other. .

A rotational force is always applied to this rotating shaft 23 by a thinly coiled spring 26. The connecting lever 22.degree. and the operating lever 32 each have a connecting rod 21. The gas seal lever 11° of each phase and the braking device 27 are connected via the operating rod 34,
An operation control rod 24 is connected to the operation lever 33, which is released during the shutoff operation and is driven upward in the figure during the closing operation. In this way, the operating device is connected to the rotating shaft 23 and the thinly coiled spring 2.
When the operation control rod 24 is released by the operation device in the sixth operation box 35, the rotating shaft 23 to which rotational force is applied by the spiral spring 26 rotates. As the rotating shaft 23 rotates, the gas seal lever 11 of each phase is connected to the connecting lever 2.
2. It is driven via the connecting rod 21 and one circuit is interrupted. In this way, when the operation force transmission of each correlation is based on the rotational movement of the rotating shaft 23, the equivalent weight of the rotating shaft 23 converted into the rotational force acting part of the thin coiled spring 26 is lighter than that using conventional linear motion. However, since the thin coil spring 26 directly applies the rotational force to the rotating shaft 23, the number of parts is small, and the weight of the operating movable parts such as the rotating shaft 23 can be greatly reduced, reducing the operating force. can do. In other words, since it is operated by rotational force, it can be operated with less force than conventional linear motion operations, and the weight of the movable operating part of the operating device can be reduced.

In this embodiment, the rotating shaft 23 has bearings 29.3 provided at both ends.
Although the support for the rotation shaft 23 is not limited to this, it is also possible to provide bearings at the center in addition to both ends. Spiral spring 2
Bending distortion of the rotating shaft 23 due to the rotational force of No. 6 can be prevented.

9. In the case of this embodiment, one braking device 27 for suppressing the excessive impact force that occurs when the interrupting operation is stopped is provided in each phase, but this is not the only option, and the braking device 27 may be provided between each phase. You can also do this.

By doing so, torsional strain of the rotating shaft 23 can be suppressed as in the case of this embodiment.

Furthermore, in this embodiment, one thinly wound spring 26 is provided between each phase.
Although the thinly wound springs 26 are provided one by one, the arrangement of the thinly wound springs 26 is not limited to this, and a plurality of thinly wound springs 26 may be provided between each phase.

Another embodiment of the invention is shown in FIG.

In this embodiment, the rotating shaft 23a is configured to also serve as the gas seal portion 36. To do this, the rotating shaft 23
The part a also serves as the gas seal part 36, so that the gas seal lever, the connecting rod connected to the gas seal lever, and the connecting lever are unnecessary, and the operating device can be operated in the above case. The weight of the parts can be reduced.

In each of the above embodiments, the case where the present invention is applied to a three-phase collectively operated puffer type gas circuit breaker has been described.

It can be applied not only to gas circuit breakers but also to gas insulated equipment having multiple circuit breakers. That is, the shutoff parts may be housed in separate containers for each phase, and the present invention can also be applied to a structure in which a plurality of shutoff parts are housed and operated in one container.

〔Effect of the invention〕

As described above, the present invention can reduce the weight of the operating movable part of the operating device of gas insulated equipment and reduce the operating force. It is possible to obtain three-phase collectively operated gas insulated equipment that makes it possible to reduce

[Brief explanation of the drawing]

FIG. 1 is a front view of a three-phase collectively operated buffer type gas circuit breaker which is an embodiment of the three-phase collectively operated gas insulated device of the present invention, and FIG. Perspective view,
Fig. 3 is a front view of the essential parts of a three-phase batch-operated gas insulated circuit breaker according to another embodiment of the three-phase batch-operated gas insulated device of the present invention, and Fig. 4 is a conventional three-phase batch-operated gas insulation device. FIG. 2 is a plan view of a three-phase collectively operated buffer type gas circuit breaker. 1... Container, 2... Fixed contact (fixed part), 3...
・Movable contact (movable part), 4... Insulated nozzle (movable part), 5... Buffer cylinder (movable part), 6... Buffer piston, 8... Insulated operation rod (movable part),
9... Shielding part, 10... Shaft part, 11... Gas seal lever (gas seal part), 20... Buffer chamber, 2
1... Connecting rod, 22... Connecting lever +, 23, 2
3a... Rotating shaft, 24... Operation control rod, 25.
...Case (fixed part), 26...Thinly wound spring, 2
7... Braking device.

Claims (1)

[Scope of Claims] 1. A plurality of cut-off parts each having a fixed part with a fixed contact and a movable part with a movable contact, and a plurality of cut-off parts that house the cut-off parts, are fixed to the fixed part, and have arc-extinguishing properties. a container filled with gas, and the movable parts of the plurality of shutoff parts have an operating device from outside the container via a gas seal part provided in the container and connected to an insulated operating rod of the movable part. In a three-phase collectively operated gas insulated device that is simultaneously operated by an operating device, the operating device is connected to the gas seal portion via a connecting rod and a connecting lever, and at least both ends thereof are rotatable to the fixed portion. a rotating shaft supported by the rotating shaft; an operation control rod connecting the rotating shaft and the operating device; a spiral spring having one end fixed to the rotating shaft and the other end fixed to the fixed part; A three-phase collectively operated gas insulated device comprising a braking device provided on the rotating shaft. 2. The three-phase collectively operated gas insulated device according to claim 1, wherein the rotating shaft also serves as the gas seal portion.