JP2002044815A - Gas-insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact gas-insulated switchgear by rationally arranging members through the effective use of space around a gear. SOLUTION: A branch flange 2b is provided with a rotary sealing part 16. A wheel 18 meshed with a pinion 12 and a wheel 19 meshed with the wheel 18 are disposed inside a branch conductor 5b in a moving contact part 5. The wheel 19A is successively connected with a connecting rod 10, an insulating rod 9, a connecting rod 11 and a main shaft 14. The other end of the main shaft 14 is penetrated out of the rotary sealing part 16 and linked to an operating device 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas insulated switchgear used in an electric station such as a power plant, a substation or a switchgear, and more particularly to a gas insulated switchgear having an improved arrangement of operating devices. It is.

[0002]

2. Description of the Related Art Conventionally, gas-insulated switches have been used in electric stations installed around large cities and seaside areas. The gas insulated switchgear seals an insulating medium with excellent insulation and arc extinguishing properties, such as SF ₆ gas, so that the space between each device can be narrowed and the site is smaller than the air-insulated switchgear. The area and installation volume can be significantly reduced. Therefore, in recent years, where it is pointed out that it is difficult to obtain land and the importance of countermeasures against salt damage, gas insulated switches have become widespread as components of electric power plants. In recent years, in consideration of environmental harmony between nature and houses, construction of electric stations in basements in buildings and in large cities has been increasing. The construction of electric stations in basements is excellent from the viewpoint of environmental harmony, but the problem is that the construction cost increases. Therefore, in order to reduce the construction cost, further downsizing of the gas insulated switch is required, and it is desired to arrange the components rationally.

Here, a conventional gas-insulated switchgear will be specifically described by taking an example of a bus-bar-integrated disconnector. As shown in the cross-sectional view of FIG. 7 and the vertical cross-sectional view of FIG. 8, the busbar-integrated disconnector 1 is provided with a container 2 having an outer diameter D. In this container 2, SF ₆ gas, which is an insulating gas, is sealed, and the bus conductor 3 is stored. Further, a branch flange 2b extending in the radial direction of the container 2 is formed on the outer peripheral portion of the container 2. The outer diameter d of the branch flange 2b is equal to the outer diameter D of the container 2.
It is set smaller than. An insulating spacer 6 is provided on the branch flange 2b. Further, a rotary seal 16 is provided on the main body of the container 2, and an operating device 17 is disposed adjacent to the rotary seal 16 (see FIG. 8).

The bus conductor 3 is arranged such that its conductor axis 3a is eccentric to the axis 2a side of the container 2. A conductor 3b is led out from the bus conductor 3, and a fixed contact portion 4 is attached thereto. And the movable contact part 5 is arrange | positioned facing the fixed contact part 4. The movable contact portion 5 includes a cylindrical portion 5 a arranged in parallel with the bus conductor 3, and a branch conductor 5 b extending in a direction orthogonal to the bus conductor 3. Of these, a movable contact 7 that moves toward and away from the fixed contact portion 4 is slidably inserted into the cylindrical portion 5a.
The branch conductor 5b is insulated and supported by the insulating spacer 6 of the branch flange 2b. The fixed contact portion 4, the movable contact portion 5 and the movable contact 7 constitute a disconnecting portion 1a.

Further, as a driving force transmitting member for transmitting the driving force from the operating device 17 to the movable contact 7, a rack 8, a pinion 12, an insulating rod 9, and a connecting rod 1 are provided.
0, 11 and a main shaft 14 are provided. The rack 8 is formed along the longitudinal direction of the movable contact 7 on the side edge of the movable contact 7 opposite to the side edge of the bus bar 3 facing the same. A rotatable pinion 12 is engaged with the rack 8.

[0008] As shown in FIG. 8, the pinion 12 is connected to the support shaft 1.
The movable contact portion 5 is supported by the cylindrical portion 5a via the bearing members 13a and 13b around the center 2a. Further, in a direction (horizontal direction in FIG. 8) orthogonal to the plane on which the busbar conductor 3 and the movable contact portion 5 are arranged, the insulating rod 9 having the insulating joint 9 a and the connecting rods 10 and 11 12a. More specifically, from the support shaft 12a of the pinion 12 outward (to the right in FIG. 8),
The connecting rod 10, the insulating rod 9, and the connecting rod 11 are connected in this order. That is, the insulating joint 9 of the insulating rod 9
The connecting rods 10 and 11 are provided at both ends of “a”, and the connecting rod 10 side is connected to the support shaft 12 a of the pinion 12. On the other hand, one end of the main shaft 14 is connected to the joining rod 11 side. The other end of the main shaft 14 penetrates the rotary seal 16 provided on the main body of the container 2 and
And is connected to the operating device 17.

[0007] In the bus-bar-integrated disconnector 1 having such a configuration, the operating device 17 rotates the main shaft 14, and accordingly, the joining rods 10, 11 and the insulating rod 9 rotate.
The rotation is transmitted to the pinion 12. When the pinion 12 rotates, the rack 8 meshing with the pinion 12 converts the rotational motion of the pinion 12 into a linear motion, and the movable contact 7 slides integrally with the rack 8. Thereby, the movable contact 7 can perform the contact / separation operation with respect to the fixed contact portion 4.

[0008]

However, the above-mentioned prior art has the following problems to be solved. That is, in the busbar-integrated disconnector 1, the rotary seal 16 is provided on the main body of the container 2.
The main shaft 14 is led out from 6 and connected to an operating device 17 outside the container 2. Therefore, as shown in FIG. 8, the dimension L1 of the busbar-integrated disconnector 1 is
The thickness was added, and it became larger. As shown in FIG. 9, when the bus-bar-integrated disconnector 1 is arranged in three phases, the operating device 17 is disposed between adjacent bus-bar-integrated disconnectors 1, and the dimension L2 between each phase is determined. And the size of the three-phase switch was increased.

The present invention has been proposed in order to solve the above-mentioned problems of the prior art, and an object of the present invention is to effectively utilize the space around the device and to arrange the members rationally. An object of the present invention is to provide a gas insulated switchgear in which the size of equipment is reduced. Another object of the present invention is to provide a gas insulated switchgear which utilizes the dead space of the three-phase arrangement and contributes to downsizing of the three-phase switch.

[0010]

In order to achieve the above object, a container filled with an insulating gas is provided, a bus conductor is accommodated in the container, and a branch flange is formed on the outer periphery of the container. A fixed contact portion is attached to the bus conductor. A movable contact portion is insulated and supported by the branch flange so as to face the fixed contact portion. A gas-insulated switch provided with a contact and provided with an operating device for providing a driving force for performing a contacting / separating operation on the movable contact outside the container has the following characteristics. .

The invention according to claim 1 is characterized in that a driving force transmitting member for transmitting a driving force from the operating device to the movable contact is led out from the branch flange and connected to the operating device.

According to the first aspect of the present invention, since the driving force transmitting member is led out of the branch flange, the operating device connected to the driving force transmitting member can be accommodated in a space adjacent to the branch flange. At this time, since the diameter of the branch flange is smaller than that of the main body of the container, the space in which the operating device is disposed enters inside the outer diameter of the container. Therefore, the size of the gas-insulated switch including the operating device is reduced as a whole, and the size of the device can be reduced.

According to a second aspect of the present invention, in the gas insulated switchgear according to the first aspect, a rack formed on the movable contact and a rotatable pinion meshed with the rack are used as the driving force transmitting member. A rotatable main shaft for transmitting a driving force from the operating device to the pinion, and a rotary seal portion for supporting the main shaft is arranged on the branch flange.

According to the second aspect of the present invention, the rotary seal portion is disposed on the branch flange, and the main shaft is derived therefrom and connected to the operating device. Therefore, the operating device is disposed in a space adjacent to the branch flange. Thus, the gas insulated switchgear can be made more compact as in the first aspect of the present invention.

According to a third aspect of the present invention, in the gas insulated switchgear according to the second aspect, a hollow branch conductor is led out of the movable contact portion in parallel with the branch flange, and the branch shaft has the main shaft inside the branch conductor. A rotatable gear for transmitting torque to the pinion is built in.

According to a fourth aspect of the present invention, in the gas insulated switchgear according to the second aspect, a hollow branch conductor is led out of the movable contact portion in parallel with the branch flange, and the main shaft is provided inside the branch conductor. A chain for transmitting torque to the pinion is provided.

According to a fifth aspect of the present invention, in the gas-insulated switchgear according to the second aspect, a hollow branch conductor is led out of the movable contact portion in parallel with the branch flange, and the main shaft is provided inside the branch conductor. A link lever transmitting torque to the pinion is provided.

In the third, fourth and fifth aspects of the present invention, the gear, chain and link lever for transmitting the rotational force of the main shaft to the pinion are provided inside the branch conductor derived from the movable contact portion. Even when the force transmitting member is provided in the branch flange, it is not necessary to increase the diameter of the branch flange. Therefore, the diameter of the branch flange can be maintained smaller than the main body of the container, and the difference between the outer diameter of the branch flange and the outer diameter of the container can be increased. Therefore, the space adjacent to the branch flange around the gas insulated switch can be widened. As a result,
The operation device can be easily accommodated in the space, and the size of the gas-insulated switch including the operation device can be reduced.

The invention according to claim 6 is the invention according to claims 1, 2,
3. The gas insulated switch according to 3, 4, or 5, wherein when the three-phase gas insulated switch is provided, the driving force transmitting members in the adjacent gas insulated switches are displaced.

In the above-mentioned invention, since the driving force transmitting members derived from the branch flanges are shifted between adjacent gas-insulated switches, the size between the phases can be reduced. it can. At the same time, space for maintenance of the gas insulated switch is easily secured, and the workability of maintenance is improved. Therefore, it can contribute to stabilization of quality.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gas-insulated switch according to the present invention will be specifically described below with reference to the drawings. Note that the same members as those in the conventional example shown in FIGS. 7 and 8 are denoted by the same reference numerals, and description thereof will be omitted.

(1) First Embodiment [Structure] First, a first embodiment including the first, second and third aspects of the present invention will be described with reference to FIG.
This will be described with reference to a vertical sectional view of FIG. A feature of the first embodiment is that the rotary seal portion 16 is disposed on the branch flange 2b. A gear 18 meshing with the pinion 12 is provided inside the branch conductor 5b of the movable contact portion 5 as a driving force transmitting member for transmitting a driving force from the operating device 17 to the movable contact 7.
A gear 19 meshing with the gear 18 is arranged. These gears 18, 19 are connected to the branch conductors 5 of the movable contact portion 5 via bearing members 13a, 13b around the support shafts 18a, 19a.
b is rotatably supported.

Further, the connecting rod 10, the insulating rod 9, the connecting rod 11, and the main shaft 14 are provided on the support shaft 19a of the gear 19.
Are sequentially connected. The other end of the main shaft 14 passes through a rotary seal portion 16 provided on the branch flange 2b, is led out to the outside, and is connected to an operating device 17.

[Effects] In the first embodiment having the above configuration, the operating device 17 rotates the main shaft 14, and the connecting rods 10, 11 and the insulating rod 9 rotate accordingly. Is transmitted to the pinion 12 via the gears 18 and 19. When the pinion 12 rotates, the rack 8 meshing with the pinion 12 changes the rotation of the pinion 12 into a linear motion, and the movable contact 7 is integrated with the rack 8.
Slides. As a result, the movable contact 7 performs a contact / separation operation with respect to the fixed contact portion 4.

According to the first embodiment, since the main shaft 14 is extended from the branch flange 2b, the operating device 17 connected to the main shaft 14 is accommodated in the space adjacent to the branch flange 2b. Can be. At this time, since the outer diameter d of the branch flange 2b is smaller than the outer diameter D of the main body of the container 2, the arrangement space for the operation device 17 is inserted inside the outer diameter D of the container 2, and The dimension L3 of the busbar-integrated disconnector 1 including the device 17 is substantially the same as the dimension of the outer diameter D of the container 2. That is, the dimension L3 in the first embodiment can be reduced by almost the thickness of the operation device 17 as compared with the conventional dimension L1.

In the first embodiment, the gears 18 and 19 for transmitting the rotational force of the main shaft 14 to the pinion 12 are provided.
Is provided inside the branch conductor 5b of the movable contact portion 5, it is possible to avoid an increase in the diameter of the branch flange 2b due to the installation of the gears 18 and 19. Therefore, the branch flange 2b can reliably secure a diameter d smaller than the outer diameter D of the container 2, and the dimensional difference between the outer diameter D of the container 2 and the outer diameter d of the branch flange 2b can be increased. . According to the first embodiment, the space adjacent to the branch flange 2b can be sufficiently used as an arrangement space for the operation device 17, and the size of the device can be reduced as a whole.

(2) Second Embodiment [Configuration] A second embodiment corresponds to the invention described in claim 4, and as shown in FIG. The support shaft 12a is provided with teeth 12b, and the shaft 20 connected to the connecting rod 10 is further provided with teeth 20a. The chain 21 is hung between the teeth 12b and the teeth 20a.

[Operation and Effect] In the second embodiment having the above configuration, the chain 21 is replaced by the chain 21.
Can transmit the rotational force from the main shaft 14 to the pinion 12. That is, the rotational force of the main shaft 14 can be transmitted from the shaft 20 to the pinion 12 via the chain 21. Accordingly, in addition to the operation and effect of the first embodiment, there is an advantage that the configuration of the driving force transmission member can be further simplified.

(3) Third Embodiment [Configuration] Next, a third embodiment corresponding to the fifth aspect of the present invention will be described with reference to FIG. The third embodiment is characterized in that levers 22, 23 and a link 24 are provided as members for transmitting the rotational force of the main shaft 14 to the pinion 12. The lever 22 is connected to the support shaft 12 a of the pinion 12, and the lever 23 is connected to the shaft 2
0, and the link 24 is connected to the lever 2
The connecting pins 25 are rotatably connected between the connecting pins 2 and 23.

[Effects] In the third embodiment described above, the rotational force of the main shaft 14 can be transmitted to the pinion 12 by the rotational operation of the levers 22 and 23 and the linear operation of the link 24. This makes it possible to further simplify the configuration of the driving force transmitting member as in the second embodiment.

(4) Fourth Embodiment [Configuration] The fourth embodiment corresponds to the invention described in claim 6, and as shown in FIG. 5, a three-phase bus-bar integrated disconnector 1A. , 1B, 1C are provided, and the branch flange 2b of each phase is provided.
The rotary seal portions 16A, 16B, and 16C provided in are arranged so as to be shifted from each other in three phases. At this time, the operation devices 17A, 17B, and 17C of each phase are connected to the bus-integrated disconnector 1 of each phase.
They are arranged so as not to be hidden by the projection planes of the containers 2A, 2B, 2C in A, 1B, 1C.

[Effects] In the fourth embodiment having the above configuration, the rotary seal portions 16A, 16B, 16C provided on the branch flange 2b are shifted for each phase.
The dimension L4 between the phases can be reduced. Moreover,
The operation devices 17A, 17B, 17C of each phase are connected to the containers 2A, 2A.
Because it is arranged so as not to be hidden by the projection planes of B and 2C,
A sufficient space for maintenance of the busbar-integrated disconnectors 1A, 1B, 1C can be secured. Therefore,
Maintenance workability is improved, which can contribute to stabilization of quality.

(5) Other Embodiments The present invention is not limited to the above embodiments. For example, as shown in FIG. 6, a three-phase bus-bar integrated disconnector 1A, 1B , 1C are arranged in three phases one above the other, the L5 dimension between the phases is reduced,
It is possible to reduce the size of the three-phase switch. Further, the configuration of the driving force transmitting member for transmitting the driving force from the operating device to the movable contact can be appropriately changed.

[0034]

According to the present invention, the driving force transmitting member for transmitting the driving force from the operating device to the movable contact is derived from the branch flange and connected to the operating device by a very simple structure. The operating device can be rationally arranged by effectively utilizing the space adjacent to the flange, and it is possible to provide a gas insulated switchgear with a compact device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of FIG.

FIG. 3 is a cross-sectional view of a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a third embodiment of the present invention.

FIG. 5 is an overall external view of a fourth embodiment of the present invention.

FIG. 6 is an overall external view of another embodiment of the present invention.

FIG. 7 is a cross-sectional view of a conventional gas-insulated switch.

FIG. 8 is a longitudinal sectional view of a conventional gas-insulated switch.

FIG. 9 is an overall external view of a conventional gas-insulated switch.

[Explanation of symbols]

 1, 1A, 1B, 1C: Integrated disconnector of busbar 2, 2A, 2B, 2C: Container 2b: Branch flange 3: Busbar conductor 4: Fixed contact portion 5: Movable contact portion 5b: Branch conductor 6: Insulating spacer 7 ... Movable contact 8 ... Rack 9 ... Insulating rod 10, 11 ... Joining rod 12 ... Pinion 13a, 13b ... Bearing member 14 ... Main shaft 16A, 16B, 16C ... Rotating seal part 17A, 17B, 17C ... Operation device 18, 19 ... Gear 21 ... chain 22, 23 ... lever 24 ... link

Claims (6)

[Claims] 1. A container enclosing an insulating gas is provided, a bus conductor is housed in the container, a branch flange is formed on an outer peripheral portion of the container, and a fixed contact portion is attached to the bus conductor. A movable contact portion is insulated and supported by the branch flange in opposition to the fixed contact portion, and the movable contact portion is provided with a movable contact that can freely contact and separate from the fixed contact portion, and is provided outside the container. In a gas insulated switchgear provided with an operating device for providing a driving force for performing a contacting / separating operation on the movable contact, a driving force transmitting member for transmitting a driving force from the operating device to the movable contact is provided with the branch flange. A gas insulated switch, wherein the gas insulated switch is derived from and is connected to the operating device. 2. A rack formed on the movable contact, a rotatable pinion meshed with the rack, and a rotatable main shaft for transmitting a driving force from the operating device to the pinion as the driving force transmitting member. The gas insulated switch according to claim 1, wherein a rotary seal portion supporting the main shaft is disposed on the branch flange. 3. A hollow branch conductor is led out of the movable contact portion in parallel with the branch flange, and a rotatable gear for transmitting a rotational force of the main shaft to the pinion is built in the branch conductor. The gas-insulated switch according to claim 2, wherein 4. A hollow branch conductor is led out of the movable contact portion in parallel with the branch flange, and a chain for transmitting a rotational force of the main shaft to the pinion is provided in the branch conductor. The gas-insulated switchgear according to claim 2, wherein 5. A hollow branch conductor is led out of the movable contact portion in parallel with the branch flange, and a link lever for transmitting a rotational force of the main shaft to the pinion is provided in the branch conductor. The gas-insulated switchgear according to claim 2, wherein 6. The driving power transmission member in an adjacent gas insulated switch when a three-phase gas insulated switch is provided, wherein the driving force transmitting members are arranged to be shifted.
The gas-insulated switch according to 3, 4, or 5.