JP2667442B2 - Circuit breaker for gas insulated switchgear - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker for a gas insulated switchgear, and more particularly to a circuit breaker for a gas insulated switchgear in which a three-phase collective breaker is operated by a common operating device. Get involved.

[Prior Art] Generally, as a circuit breaker for a gas insulated switchgear, a three-phase shutoff unit is housed in a common container and configured as a three-phase package, and each of these phase shutoff units is operated by a common operating device. Is known.

Such a circuit breaker is disclosed, for example, in Japanese Patent Application Laid-Open No. Sho 56-6333, which is shown in FIGS. 6 and 7.

FIG. 6 is a front view, in which a common operating device 2 is provided via a mechanical unit container 3 below one vertical common container 1 containing three-phase shutoff parts. The terminals of each phase cut-off section are led out from a pair of openings formed on the upper and lower sides of the common container 1 and connected to disconnectors and the like (not shown) to constitute a gas insulated switchgear.

FIG. 7 is a sectional view taken along line VII-VII of FIG.
Position the levers 21U, 21V, 21W at the lower end of the insulated operation rod connected to the movable contact of each phase cutoff unit 20U, 20V, 20W.
1V is directly connected to the rotating main shaft 6, and the lever 21W is connected to the rotating main shaft 6 via the link 28 and the lever 31. The rotating main shaft 6 is led out of the mechanism container 3 via the rotating seal part 10, and a connecting lever 7 is provided at the leading end. The operating device 2 is connected to the connecting lever 7, and specifically, the drive device 22 for performing the interruption operation of the interruption portion, the closing spring device 5 for performing the closing operation of the interruption portion, and the energy at the end of the operations of these devices are provided. It is connected to the absorbing dashpot device 4. The rotation main shaft 6 is rotated by the forces in the opposite directions given by the drive device 22 and the closing spring device 5 alternately, and the respective phase breakers 20U, 20V, 20W are operated via the levers 21U, 21V, 21W. .

[Problems to be Solved by the Invention] Since the conventional circuit breaker for gas-insulated switchgear has the above-described configuration, the connecting lever 7 connected to the operating device 2 has the common container 1 and the mechanism by the rotary seal portion 10. The operating device 2, which is located at the end of the rotary main shaft 6 on the side where the gas is separated from the partial container 3 and is connected to the connecting lever 7, is also disposed at a position considerably away from the center of the common container 1. , Sixth
As shown in the drawing, the operation device 2 protrudes sideways. For this reason, as shown in FIG. 9, in the gas-insulated switchgear having the row board structure, the operation device 2 protruding laterally has a large attachment area having a large dimension l ₁ in the width direction.

In order to solve this, it is conceivable to take a configuration like an insulator type circuit breaker shown in FIG. That is, the operating shaft 8 is coaxially connected to the movable contactor of the shut-off portion 1 housed in the porcelain tube, and the drive device 22, the closing spring device 5, and the dump pot device 4 are configured along the operating shaft 8. ,
If the gas is divided between the shut-off portion 1 and the operating device 2 by the linear sealing portion 9, it is possible to prevent the operating device 2 from protruding to the side and reduce the width direction.

However, if this idea is applied to a gas-insulated switchgear, the position of the common container that houses the breaker will be high, impairing the feature of being excellent in earthquake resistance, and even for other devices connected to the breaker. And in the end,
Not a desirable solution.

The object of the present invention is to reduce the attachment area by suppressing the lateral protrusion of the operating device that is common to the three-phase shutoff parts, and to provide gas insulation with excellent earthquake resistance without raising the position of the common container. An object of the present invention is to provide a circuit breaker for a switchgear.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a mechanism in which a rotating main shaft is placed in a mechanism unit container in a plan view, and two of the phase shut-off portions and another one of the phase shut-off portions. And a drive shaft of a drive device which is arranged in a state of extending in the radial direction and is connected to one of the movable contacts via a lever provided on the rotating main shaft, and another one of the movable contacts. And a closing spring device that is connected to the rotary main shaft via another lever, and one end is connected to the remaining one of the movable contacts and the other end is connected to yet another lever provided to the rotary main shaft. The link is disposed in a substantially horizontal direction orthogonal to the axis of the rotating main shaft, and a seal portion is provided at a portion between the lever of the drive shaft and the drive device.

[Operation] Since the gas-insulated switchgear according to the present invention is configured as described above, the connecting lever connected to the drive device can be provided at an arbitrary position in the axial direction of the rotating main shaft, so that the end portion of the rotating main shaft is different from the conventional one. The position of the connecting lever can be brought closer to the center side of the common container, and the lateral protrusion of the operating device can be suppressed, as compared with the case where the connecting lever is provided further outside of the rotary seal portion provided in. . Moreover, since the rotating main shaft, the drive shaft, the closing spring device and the link are arranged substantially horizontally in the mechanism unit container, it is not necessary to increase the size of the mechanism unit container in the height direction. The position of one common container that accommodates each phase cutoff can also be kept low.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

2 and 3 are a plan view and a front view of a gas-insulated switchgear circuit breaker.

An opening is formed in the common container 1 accommodating the three-phase cutoff portion as shown by a dotted line in FIG. 3, and a disconnector or the like (not shown) is connected to this opening to form a gas insulated switchgear. . The operating device 2 for operating each phase shut-off unit, in particular, the driving device 22 configured to operate by receiving an operation command and configured in the operating box is moved to the center side of the common container 1 as compared with the conventional case. Therefore, the lateral protrusion of the driving device 22 is suppressed. As described above, the operating device 2 includes, for example, the drive device 22 for performing the opening operation, the closing spring device 5 for performing the closing operation, and the dump port device 4, and are configured so that the same gas space is provided under the common container 1. It is connected to each phase shut-off part in the mechanism part container 3.

FIG. 1 is a cross-sectional view taken along the line II of FIG.

The rotating main shaft 6 is mounted in the mechanism container 3 by bearings 23A and 23B.
Are rotatably supported. The rotating main shaft 6 is arranged to extend in the width direction of the circuit breaker, and levers 21U, 21V, 31 are connected to the rotating main shaft 6 in the mechanism unit container 3. lever
An insulating operating rod 24U connected to the movable contact of the breaking unit 20U showing a planar positional relationship is connected to one end of the 21U, and a dump pot device arranged in opposite directions as shown in FIG. 4 at the other end. 4 and drive shafts 25 and 26 of the drive device 22. The driving device 22 in this embodiment is a fluid pressure driving device, which is disposed outside the mechanism container 3. Therefore,
The drive shaft 26 must be operated while keeping the mechanism container 3 airtight.
Is composed.

In addition, one end of the lever 21V shown in FIG.
The other end is connected to the drive shaft 27 of the closing spring device 5.

Further, as shown in FIG. 5, one end of a link 28 is connected to a lever 31 provided in the middle of the rotary main shaft 6, and the other end of the link 28 is connected to an appropriate position of the mechanism container 3 by a metal fitting 29. One end of a lever 21W that supports the rotation shaft 30 is connected to the lever 21W. The other end of the lever 21W has a blocking portion 2 indicating a planar positional relationship.
The insulating operation rod 24W connected to the movable contact of 0W is connected.

Therefore, the driving device 22 is disposed outside the mechanism container 3, but the dash pot device 4 and the closing spring device 5 are configured in the same gas space as the mechanism container 3. The major difference from the conventional example is that the rotating spindle 6 is disposed in the mechanism unit container 3, and the rotating spindle 6 has no seal portion.

When the rotary main shaft 6 of FIG. 4 is rotated counterclockwise by the drive device 22, the levers 21U and 21V rotate counterclockwise, respectively, and the insulating operation rods 24U and 24V are driven downward to cut off the breaking portion. 20U and 20V are opened, and the lever 31 and the lever 21W shown in FIG. 5 are rotated counterclockwise to drive the insulating operating rod 24W downward to open the interrupting section 20W.

On the other hand, the closing of the blocking portion is performed by the spring force of the closing spring device 5 by removing the operating force of the driving device 22 or the open state holding force.

In the above-described embodiment, the rotation unit 6 has
Since the drive device 22 is connected to the lever 21U connected to the insulating operation rod 24U, and the drive shaft 26 of the drive device 22 is kept airtight by the linear seal portion 9 and is led out of the mechanism portion container 3,
The position of the driving device 22 can be closer to the central axis of the common container 1 than before, and it is possible to suppress the driving device 22 from protruding to the side.

Accordance connexion, when a plurality of breakers were panel array arrangement as FIG. 10, it is possible to reduce the widthwise dimension l ₂ as a whole.

In addition, since the rotating main shaft 6, the drive shafts 25, 26, 27, the links 28, and the like disposed in the mechanism container 3 are disposed substantially horizontally, the height dimension of the mechanism container 3 is increased. It is not necessary to reduce the position of the common container 1 as compared with the configuration shown in FIG. 8 and the like, and it is possible to improve the earthquake resistance, and to operate the movable container by being connected to one of the movable contacts. Since the lever 21U is also used as a lever for connecting the drive shafts 25 and 26 and the rotary main shaft 6, the structure is simpler and the device can be made compact.

In addition, although the fluid pressure drive device is used as the drive device 22, a spring operation type or a hydraulic drive device may be used.

[Effects of the Invention] As described above, according to the present invention, a three-phase shut-off portion is housed in one common container and configured as a three-phase package.
In each of these phase breakers operated by a common operating device arranged at the bottom of the common container, the lever connected to the drive shaft of the drive device is arranged in the axial direction of the rotating main shaft because it is configured as described above. Therefore, the position of the lever can be set to the position of the common container as compared with the case where the lever is provided further outside the rotary seal portion provided at the end of the rotating main shaft as in the conventional case. Since it is possible to approach the center side, it is possible to suppress the operation device from protruding to the side and reduce the attached area.

Moreover, since the rotating main shaft, the drive shaft of the drive device, the closing spring device, and the link are all arranged substantially horizontally in the mechanism container, it is not necessary to increase the size of the mechanism container in the height direction. The position of the common container connected above can be lowered to improve the earthquake resistance, and a lever that is connected to one of the movable contacts and operates the lever is a lever that connects the drive shaft of the drive device and the rotation main shaft. As a result, the structure is simple and the device can be made compact.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a circuit breaker for a gas insulated switchgear according to an embodiment of the present invention. FIGS. 2 and 3 are plan and front views of the circuit breaker for a gas insulated switchgear. 5 and 5 are sectional views taken along lines IV-IV and VV of FIG. 1, FIG. 6 is a front view of a conventional circuit breaker for a gas insulated switchgear, and FIG. VII-VII line sectional view, FIG. 8 is a vertical sectional view of a conventional insulator-type circuit breaker, FIG. 9 is a front view showing the row board configuration of FIG. 6, and FIG. 10 is the row panel configuration of FIG. FIG. 1 ... common container, 3 ... mechanism container, 5 ... closing spring device, 6 ... rotating main shaft, 9 ... linear seal part, 20U, 20V, 20
W ... breaking part, 21U, 21V, 21W, 31 ... lever, 22 ... drive device, 26, 27 ... drive shaft.

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Shoji Tanabe 1-1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture Kokubun Plant, Hitachi, Ltd. (72) Inventor Masami Fukaya 1-1, Kokubuncho, Hitachi City, Ibaraki Prefecture No. 1 In the Kokubu Plant of Hitachi, Ltd.

Claims (2)

(57) [Claims] 1. A three-phase blocking section is arranged in one common container filled with an insulating gas so that its operation direction is vertical and located at each vertex of a triangle, and is connected to the lower part of the common container. In a circuit breaker for a gas insulated switchgear, the movable contact of each phase cut-off unit and a drive device outside the mechanism unit container are connected via a rotating main shaft rotatably provided in the mechanism unit container. , The rotation main shaft is arranged in the mechanism container in a state of being located between two of the phase blocking parts and another one of the phase blocking parts in plan view and extending in the radial direction. A drive shaft of the drive device, which is connected to one of the movable contacts through a lever provided on the rotary main shaft, and another one of the movable contacts and another lever provided on the rotary main shaft. The closing spring device connected through A link that is connected to one of the levers and that is connected to the other lever provided on the rotary main shaft at the other end is arranged in a substantially horizontal direction orthogonal to the axis of the rotary main shaft, and the lever of the drive shaft and the lever are connected to each other. A circuit breaker for a gas insulated switchgear, wherein a seal portion is provided in a portion between the driving device and the driving device. 2. A circuit breaker for a gas insulated switchgear according to claim 1, wherein a dashpot device is connected to a side opposite to the drive shaft of the lever to which the drive shaft is connected.