JPH10271650A - Gas insulated switchgear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the range of dropping the gas pressure at inspection or accident of an apparatus, by providing an O-ring between either flange of adjacent grounding metallic containers and an insulating spacer. SOLUTION: A metallic ring 20 is provided between the flange 7 of a grounding metallic container 7 and an insulating spacer 8. Screws 22 for temporary fastening are provided at equal intervals at four places on the circumference of this ring 20, and by these screws 22 for temporary fastening, it is temporarily fastened to the flange 7a of an earth metallic container 7, and further on the circumference of the ring 20, screws 23 are provided at twelve places, and by these screws 23, an insulating spacer 8 is fastened. Hereby, even in the case of removing the earth metallic container 7, the condition that the insulating spacer 8 is fastened at all times by the flange 8a and the ring 20 is kept, so the range of dropping the pressure of the insulating gas within the earth metallic container 9 on opposite side can be minimized.

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 a power plant, a substation, and the like, and more particularly, to an improvement in a connection portion of constituent devices.

[0002]

2. Description of the Related Art Generally, in electric stations such as power plants and substations, lines are connected and disconnected by gas-insulated switchgears. In this gas insulated switchgear, an insulating gas such as SF ₆ gas having excellent insulating properties is pressurized and sealed in a grounded metal container, and a high voltage conductor is housed in a state insulated from the grounded metal container by an insulating spacer or the like. It is configured. Such a gas insulated switchgear includes a gas insulated switch such as a circuit breaker, a disconnector, and a ground switch for opening and closing an electric circuit, and devices such as a connection bus and a current transformer attached to the gas insulated switch. And all these devices,
Alternatively, the main equipment is gas-insulated.

[0003] In recent years, electric stations have been required to be installed in places close to the power demand side, such as cities and factory zones. Along with this, there is a strong demand for minimizing power outages at electric power stations. Therefore, conventionally, such a gas insulating device has been improved for the purpose of minimizing a power outage time of an electric power plant at the time of an accident.

FIG. 23 shows a configuration example of such a gas insulated switchgear. In the figure, a U-shaped circuit breaker 1 is erected perpendicular to an installation surface, and is provided with an upper outlet 1a and a lower outlet 1b. This top opening 1
To a, a current transformer 2 is connected in parallel to the installation surface, and further, a combined disconnector / ground switch 3, a line-side bus 4, and a cable head 5 are sequentially connected. .
The main bus 13 is connected to the lower outlet 1b in parallel with the installation surface via a combined bus-bar disconnector / grounding switch 6. In such a gas insulated switchgear, for example, gas division is performed at gas division points X1, X2, X3, and X4.

FIG. 24 shows a detailed structure of a connecting portion 80 between the respective devices which are classified as described above. As shown in the figure, a grounded metal container 7, which forms a pipeline in which each device is stored,
9, an insulating spacer 8 is arranged. The insulating spacer 8 is fixed such that its flange portion FS is sandwiched between flanges 7a, 9a provided at the ends of the grounded metal containers 7, 9. The insulating spacer 8 is provided to separate the gas between the grounded metal containers 7 and 9 and to support a conductor and an opening / closing portion disposed therein.

FIG. 25 shows a connecting portion 80 shown in FIG.
FIG. In the figure, an insulating spacer 8 is fixed to flanges 7a, 9a via nuts 11a, 11b via studs 10. Further, the insulating gas in the grounded metal containers 7 and 9 is
2b.

FIG. 26 shows a connecting portion 80 shown in FIG.
2 shows a connection structure between the ground metal containers 7, 9 including the insulating spacers 8 and the insulating spacers 8. In the figure, high-voltage conductors 14 and 17 are insulated and supported inside grounded metal containers 7 and 9, respectively.
They are connected by contacts 16. The embedded metal 15 is fixed to the center of the insulating spacer 8, and the above-described connecting portions 80 are symmetrically arranged with the embedded metal 15 interposed therebetween. Further, an insulating gas 18 is sealed in the grounded metal containers 7 and 9.

[0008]

The above-mentioned conventional gas-insulated switchgear has the following problems during inspection or accident. In FIG. 26, when the ground metal container 7 is to be removed at the time of inspection or accident, first, the nut 11a on the ground metal container 7 side is removed, and the ground metal container 7 and the insulating spacer 8 are separated. As a result, the insulating spacer 8 is fixed to the grounded metal container 9, that is, fastened to the flange 9 a of the grounded metal container 9. In this case, the grounding metal container 9 of the insulating spacer 8
Side is removed, the hermeticity inside the grounded metal container 9 is reduced, and the insulating gas 1 inside the grounded metal container 9 is reduced.
8, the operation had to be performed with the gas pressure lowered.

As described above, when the gas pressure of the insulating gas 18 in the grounded metal container 9 decreases, the dielectric strength inside the grounded metal container 9 becomes insufficient. For this reason, for example, the main bus 13 shown in FIG. 24 is stopped, and the lines of the entire electric station connected to the main bus 13 are stopped. Therefore, in order to remove only the grounded metal container 7 at the time of inspection or accident, the gas pressure in a wide area in the electric substation must be reduced, and the downtime of the electric substation including the work and their restoration work is considerably long. There was a problem of becoming.

[0010] Further, the above-mentioned conventional gas-insulated switchgear has a problem as described below in the connection structure between the devices. When connecting and disconnecting each device, the divided surfaces are the flanges 7a, 9a of the metal containers 7, 9 and the flange portion FS of the insulating spacer 8. Generally, the flange portion FS of the insulating spacer 8 is formed of an epoxy resin or the like. Therefore, there is a possibility that the flange portion FS may be damaged by the connection and disconnection. Therefore, there is a problem that reliability, quality, and safety are reduced.

The present invention has been proposed to solve such problems of the prior art, and its main object is to consider the arrangement of components and the configuration of parts in a gas insulated switchgear. Accordingly, it is an object of the present invention to improve the working efficiency by minimizing the range in which the gas pressure is reduced at the time of inspection or accident of equipment and minimizing the stop range of the electric station.

Another object of the present invention is to improve reliability, quality, and safety of a gas-insulated switchgear by improving the divisional surfaces of the connecting portions of the devices by the surfaces of metal flanges. It is in.

[0013]

According to a first aspect of the present invention, there is provided a gas insulated switchgear according to the present invention, in which a high-voltage conductor is inserted into a grounded metal container in which an insulating gas is sealed, and a flange is provided between the grounded metal containers. In a gas insulated switchgear configured to insulate and support the high-voltage conductor by disposing an insulating spacer, a ring is provided between any one of the flanges of the adjacent grounded metal container and the insulating spacer. And

According to the first aspect of the present invention, when a grounded metal container having no ring among adjacent grounded metal containers is removed during an accident or inspection, the flange and ring of the grounded metal container are removed. Disconnect. Therefore, the state where the insulating spacer connected to the flange of the sound grounded metal container is fixed from both sides by the flange and the ring is maintained. Therefore, it is not necessary to lower the gas pressure in the sound grounded metal container, and the stop time of the electric station can be reduced by eliminating the processing time associated with the lowering of the gas pressure. Can be minimized, thereby improving workability.

Further, when disconnecting and connecting the grounded metal container, the insulating spacer is not brought into direct contact with the flange but through the ring, so that the insulating spacer can be prevented from being damaged.

According to a second aspect of the present invention, in the gas insulated switchgear according to the first aspect, the flange of the one grounded metal container, the ring, the insulating spacer, and the one grounded metal container are provided. It is characterized in that the flanges of the adjacent other grounded metal containers are overlapped, studs are inserted in the vicinity of their outer periphery, and both ends of the studs are fastened by nuts.

According to the invention described in claim 2, both ends of the stud, that is, the flange side of one of the grounded metal containers,
The other ground metal container is fastened to the flange side by a nut. Therefore, the ground metal container can be separated by loosening the flange of one ground metal container, that is, the nut on the flange side in contact with the ring. As described above, since the separation can be performed while easily visually recognizing from the outside, the workability can be improved. Further, since the other flange, the insulating spacer, and the ring are fixed by the studs, the state where the insulating spacer is tightened from both sides is maintained.

According to a third aspect of the present invention, in the gas insulated switchgear according to the first aspect, the flange of the one grounded metal container, the ring, the insulating spacer, and the one grounded metal container are provided. A flange of the adjacent other grounded metal container is overlapped, a plurality of studs are inserted near the outer periphery thereof, and both ends of each of the studs are tightened by nuts, and the ring, the insulating spacer, and the other grounded metal are connected. In the vicinity of the outer periphery of the container with the flange, the other grounded metal container is tightened with a bolt from the flange side.

According to the third aspect of the invention, when one of the grounded metal containers is cut off, the nut on the flange side of the grounded metal container can be loosened to separate the grounded metal container. At this time, the bolt does not need to be loosened because it is not tightened to the flange of the grounded metal container, and the state in which the insulating spacer is fixed by the flange and the ring of the other grounded metal container by the bolt is maintained. You.

According to a fourth aspect of the present invention, there is provided the gas insulated switchgear according to the first aspect, wherein the flange of the one grounded metal container, the ring, the insulating spacer, and the one grounded metal container. Overlap the flange of the other adjacent grounded metal container, in the vicinity of their outer periphery,
It is characterized in that each of the two flanges is tightened with a bolt.

According to the fourth aspect of the present invention, the ground metal container can be cut off by loosening the flange of one ground metal container, that is, the bolt on the flange side in contact with the ring. As described above, since the separation can be performed while easily visually recognizing from the outside, the workability can be improved. At this time, the other flange, the insulating spacer, and the ring are fixed by the other bolt, so that the state in which the insulating spacer is tightened from both sides is maintained.

According to a fifth aspect of the present invention, in the gas insulated switchgear according to the first aspect, the flange of the one grounded metal container forms an outer flange, and the flange of the other grounded metal container forms an inner flange. Is characterized in that the ring, the insulating spacer, and the inner flange are tightened by bolts, and the ring is tightened by another bolt from the outer flange side.

According to the fifth aspect of the present invention, when the outer flange is removed, only the bolts for fastening the outer flange and the ring need be loosened, and the workability can be improved.

A gas-insulated switchgear according to a sixth aspect of the present invention is the gas-insulated switchgear according to the fifth aspect of the present invention,
Along the outer circumference of the ring, the insulating spacer, and the inner flange, a bolt for tightening the outer flange and the ring, and a bolt for tightening the ring, the insulating spacer, and the inner flange are alternately formed in the same circle. It is characterized by being arranged on the circumference.

According to the sixth aspect of the invention, the flange diameter and the ring diameter can be reduced.

According to a seventh aspect of the present invention, in the gas insulated switchgear according to any one of the first to sixth aspects, the ring includes the one grounded metal container and the other grounded metal container. When reconnecting after disconnection, a connection jig serving as a guide for connecting the high-voltage conductor in the one ground metal container and the high-voltage conductor in the other ground metal container is detachably attached. The connection jig is configured so as to have an opening having a size through which the high-voltage conductor of the one ground metal container can pass.

According to the seventh aspect of the invention, the following operation and effect can be obtained. That is, when disconnecting and reconnecting adjacent grounded metal containers, it is necessary to connect the high voltage conductors in each grounded metal container. At this time, by attaching a connection jig to the ring, one of the high-voltage conductors is passed and connected to the other high-voltage conductor in the grounded metal container. Since the connection jig can be attached as a guide in this manner, the eccentricity of the high-voltage conductor during connection prevents an eccentric load from being applied to the insulating spacer.

According to an eighth aspect of the present invention, in the gas insulated switchgear according to the seventh aspect, a projection is provided on the connection jig, and a projection of the connection jig is inserted into the ring. A jig mounting hole is provided, and the connection jig is fixed by inserting the projection into the jig mounting hole.

According to the present invention, the connection jig can be attached and detached with a simple structure.

A gas insulated switchgear according to a ninth aspect of the present invention is the gas insulated switchgear according to any one of the first to eighth aspects, wherein the circuit breaker and the bus-side disconnector are connected. The insulating spacer is disposed between a flange of the grounded metal container of the circuit breaker and a flange of the grounded metal container of the bus-side disconnector, and the flange and the insulating spacer on the circuit breaker side The ring is provided between them.

According to the ninth aspect of the present invention, when the circuit breaker is removed at the time of inspection of the circuit breaker or at the time of an accident, the insulating spacer is fixed to the bus-side disconnector by a ring. There is no need to reduce the gas pressure in the disconnector. Therefore, the processing time associated with the decrease in the gas pressure can be reduced, and the range in which the gas pressure is reduced in the electric station can be minimized, so that the workability can be improved. In addition, by setting the disconnector in the open state and the grounding switch combined with the disconnector in the closed state, the work can be performed without stopping the main bus of the bus-side disconnector. Therefore, it is possible to shorten the stop time of the electric substation at the time of an accident or an inspection work, etc., and to improve workability.

A gas-insulated switchgear according to a tenth aspect of the present invention is the gas-insulated switchgear according to any one of the first to eighth aspects, wherein the bus and the cable head are connected. The insulating spacer is disposed between the flange of the grounded metal container and the flange of the grounded metal container of the cable head, and between the flange of the cable head and the insulating spacer,
It is characterized in that the ring is provided.

According to the tenth aspect of the present invention, it is not necessary to lower the gas pressure of the bus bar when removing the grounded metal container of the cable head at the time of opening / closing the cable head. Therefore, the processing time associated with the decrease in gas pressure can be shortened, and the range in which the gas pressure decreases at the electric substation can be minimized, so that the stop time of the electric substation is reduced and the workability is improved. be able to.

According to an eleventh aspect of the present invention, there is provided a gas insulated switchgear according to any one of the first to eighth aspects, wherein the line-side disconnector and the grounding switch are combined. A gas-insulated switchgear in which the line-side disconnector / ground switch and the cable head are connected,
The insulating spacer is disposed between the flange of the grounded metal container of the far-side disconnector / grounding switch and the flange of the grounded metal container of the cable head.
The ring is provided between the flange of the cable head and the insulating spacer.

According to the eleventh aspect of the present invention, it is not necessary to lower the gas pressure of the line-side disconnector when removing the ground metal container of the cable head during opening and closing work of the cable head. Therefore, the processing time associated with the decrease in gas pressure can be shortened, and the range in which the gas pressure decreases at the electric substation can be minimized, so that the stop time of the electric substation is reduced and the workability is improved. be able to.

A gas insulated switchgear according to a twelfth aspect of the present invention is the gas insulated switchgear according to any one of the first to eighth aspects, wherein the gas insulated switchgear has at least two lines, and the first bus side of the first line side. A gas-insulated switchgear comprising a disconnector and a second bus-side disconnector on a second circuit side, wherein a bus is disposed between these two circuits, wherein the first bus-side disconnector is Between the flange of the ground metal container and the ground metal container of the bus, and between the flange of the ground metal container of the second bus-side disconnector and the ground metal container of the bus, Insulating spacers are arranged respectively,
The ring is provided between each of the insulating spacers and both ends of the ground metal container of the bus bar.

According to the twelfth aspect of the invention, for example, when removing the first bus-side disconnector on the first line side, the second
Since the insulating spacer attached to the second bus-side disconnector on the line side is fixed by the ring and the flange of the grounded metal container of the second bus-side disconnector, the second bus-side disconnector There is no need to lower the gas pressure of the gas. for that reason,
It is possible to shorten the processing time due to the decrease in gas pressure and to minimize the range in which the gas pressure is reduced at the electric substation, thereby shortening the stop time of the electric substation and improving the workability. it can. The same effect can be obtained when the second bus disconnector on the second line side is removed.

A gas insulated switchgear according to a thirteenth aspect of the present invention is the gas insulated switchgear according to any one of the first to eighth aspects, wherein the gas insulated switchgear has at least two lines, and the first bus side of the first line side. A gas-insulated switchgear comprising a disconnector and a second bus-side disconnector on a second line side, wherein a bellows-structured detachable bus is disposed between these two lines, wherein the first bus side Between the flange of the grounded metal container of the disconnector and the flange at one end of the detachable bus, and
The insulating spacers are respectively disposed between the flange of the grounded metal container of the bus-side disconnector and the flange at the other end of the detachable bus, and one of the insulating spacers and the detachable bus are provided. Characterized in that the ring is provided between the end and the flange.

According to the thirteenth aspect, for example, when removing the first bus-side disconnector on the first line side,
Since the insulating spacer attached to the second bus-side disconnector on the line side is fixed by the ring and the flange of the grounded metal container of the second bus-side disconnector, the second bus-side disconnector There is no need to lower the gas pressure of the gas. for that reason,
It is possible to shorten the processing time due to the decrease in gas pressure and to minimize the range in which the gas pressure is reduced at the electric substation, thereby shortening the stop time of the electric substation and improving the workability. it can. When the second bus disconnector on the second circuit side is removed, the insulating spacer attached to the first bus disconnector on the first circuit side is
The same effect can be obtained because it is fixed by the flange of the detachable bus and the flange of the grounded metal container of the first bus-side disconnector.

A gas insulated switchgear according to a fourteenth aspect of the present invention is the gas insulated switchgear according to any one of the first to eighth aspects, wherein the switch is of a double bus type, and the first bus side disconnection on the first bus side. A gas-insulated switchgear comprising a switch and a second bus-side disconnector on the second bus side, wherein a detachable bus having a bellows structure is arranged between the two buses, wherein the first bus-side disconnection is provided. Between the flange of the grounded metal container of the vessel and the flange at one end of the detachable busbar, and the flange of the grounded metal container of the second busbar disconnector, and the other end of the detachable busbar. The insulating spacers are respectively disposed between the flanges of the section and the ring, and the ring is provided between any one of the insulating spacers and the end of the detachable bus bar and the flange.

According to the fourteenth aspect of the present invention, for example, when removing the first bus-side bus disconnector, the insulating spacer attached to the second bus-side second bus disconnector is Since it is fixed by the ring and the flange of the grounded metal container of the second bus-side disconnector, there is no need to lower the gas pressure of the second bus-side disconnector. Therefore, the processing time associated with the decrease in gas pressure can be shortened, and the range in which the gas pressure decreases at the electric substation can be minimized, so that the stop time of the electric substation is reduced and the workability is improved. be able to. When the second busbar-side disconnector on the second busbar side is removed, the insulating spacer attached to the first busbar-side first busbar-side disconnector includes a flange of the detachable busbar and a first busbar-side disconnector. Since the busbar side disconnector is fixed to the flange of the grounded metal container, the same effect can be obtained.

According to a fifteenth aspect of the present invention, in the gas insulated switchgear according to the thirteenth or fourteenth aspect, one of the first bus-side disconnector and the second bus-side disconnector is removed. At this time, a flat plate is attached to the opening of the detachable bus, and the inside of the detachable bus is subjected to an end process of the other bus of the first bus disconnector or the second bus disconnector. It is characterized by being configured to be used as a tank.

According to the fifteenth aspect of the present invention, by using the detachable bus as it is and using it as a tank for performing the end processing of the bus of the healthy bus-side disconnector, only gas processing in the tank is performed. For example, the gas processing time can be reduced. Therefore, the stop time of the electric station can be further reduced, and workability can be improved.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of a gas insulated switchgear according to the present invention will be described with reference to the drawings. Note that the same members as those described in the above-described related art are denoted by the same reference numerals, and description thereof will be omitted.

[1. First Embodiment] [1-1. Configuration] An embodiment corresponding to the first and second aspects of the present invention will be described as a first embodiment with reference to FIGS. FIG. 1A is a side view showing a structure of a connection portion 80 between respective devices of the gas insulated switchgear according to the first embodiment, and FIG. 1B is an arrow A in FIG. It is -A 'sectional drawing. As shown in FIG. 1A, a metal ring 20 is provided between the flange 7 a of the grounded metal container 7 and the insulating spacer 8. FIG.
As shown in (b), the insulating spacer 8 is provided around the circumference thereof with temporary fastening bolts 21, 21,.
Is temporarily fastened to the flange 9a. In the figure, four insulating spacers 8 are arranged at equal intervals on the circumference thereof.
By being temporarily tightened, it is fixed to the flange 9a.

FIG. 2 shows a schematic configuration of the ring 20. 2A shows a cross-sectional view of the ring 20 as viewed from the side, and FIG. 2B shows a cross-sectional view of the ring 20 as viewed from the front. As shown in FIG. 2B, the ring 20 has a donut shape, and the screws for temporary tightening 22 and
Are provided, for example, at four locations at equal intervals. The ring 20 is temporarily fastened to the flange 7a of the grounded metal container 7 by these temporary fastening screws 22, 22,. Further, on the circumference of the ring 20, for example, twelve screws 23, 23,... For tightening the insulating spacer 8 are provided.

FIG. 3 is a detailed sectional view of the connecting portion 80. As shown in the figure, a tap hole is formed in the ring 20, and a drill hole is formed in the flange portion FS of the insulating spacer 8 and the flanges 7a and 9a. The stud 10 is passed through the flange 9 a and the flange portion FS of the insulating spacer 8 and screwed into the tapped hole of the ring 20,
Furthermore, it passes through the flange 7a and is fastened by the nuts 11a and 11b.

That is, the insulating spacer 8 is
a and the ring 20 through the stud 10
1a and 11b. Further, the ring 20 and the flange 7a are also fastened by the nuts 11a and 11b via the studs 10. Further, in this case, the insulating gas 18 sealed in the grounded metal containers 7 and 9 is used.
Are sealed by O-rings 12a, 12b, 12c.

[1-2. Operation and Effect] In the first embodiment having the above configuration, the following operation and effect can be obtained. That is, when it is necessary to remove the grounded metal container 7 at the time of checking the grounded metal container 7 or at the time of an accident, the nut 11a on the grounded metal container 7 side is removed. Also, the flange 7a and the ring 20 are separated from each other by removing the screws 22 for temporary fastening. Thus, the ground metal container 7 and the ring 20 are separated. At this time, the ring 20 is fastened to the insulating spacer 8 by the screws 23, 23,.

Further, as shown in FIG. 3, the insulating spacer 8 is sandwiched between the flange 9a and the ring 20 and is fastened by the studs 10. Therefore, even when the flange 7a is removed, the insulating spacer 8 can be connected to the flange 9a and the ring 20. 20.

As described above, the insulating spacer 8 and the flange 9
Since the ring 20 is provided between the insulating spacer 8 and the a, the insulating spacer 8 is in a state of being tightened by the flange 9 a and the ring 20 even when the ground metal container 7 is removed. That is, since the insulating spacer 8 is always maintained in a state of being tightened from both sides, the ground metal container 9 on the opposite side is
There is no need to lower the gas pressure of the insulating gas 18 inside.
Therefore, it is not necessary to stop the main bus and the lines of the entire electric station connected to the main bus as the gas pressure in the grounded metal container 9 decreases as in the related art. Therefore, the gas processing time relating to the grounded metal container 9 is not required, so that the stop time of the entire electric power station due to a decrease in gas pressure can be reduced. Further, since the range in which the gas pressure is reduced can be minimized, the working efficiency can be improved.

When the grounding metal container 7 and the grounding metal container 8 are disconnected and connected, the flange 7a and the insulating spacer 8 do not directly contact each other, but the metal surfaces contact each other via the ring 20. Therefore, damage to the flange portion FS of the insulating spacer 20 can be prevented.

[2. Second Embodiment] [2-1. Configuration] An embodiment corresponding to the third aspect of the present invention will be described as a second embodiment with reference to FIGS. FIG. 4 is a cross-sectional view showing a coupling structure between devices of the gas insulated switchgear according to the second embodiment. In the figure, a flange 9a, an insulating spacer 8, a ring 20, and a flange 7a are connected to nuts 11a and 11b via a portion tightened by a bolt 51 and a stud 10.
And a part fastened by. That is,
4, the bolt 51 is screwed into the flange 9a, the flange FS of the insulating spacer 8, and the ring 20. In the connection part 82 shown below, the stud 10 penetrates the flange 9a, the insulating spacer 8, the ring 20, and the flange 7a, and is fastened by nuts 11a and 11b.

FIG. 5 is a sectional view taken along the line BB 'shown in FIG. As shown in FIG.
Are screwed in four places, and two nuts 11b are attached to each of the bolts 51.

[2-2. Operation and Effect] In the second embodiment having the above configuration, the following operation and effect can be obtained. Here, FIG. 6 shows a state in which the grounded metal container 7 and the grounded metal container 9 are separated. As shown in the figure, when the ground metal container 7 and the ground metal container 9 are separated,
By removing the nut 11a shown in FIG. 4 and removing the stud 10 from the flange 7a, the flange 7a and the ring 20 are separated. At this time, the contact 16 of the conductor 17 on the ground metal container 9 is removed from the conductor 13 on the ground metal container 7. When the ground metal containers 7 and 8 are connected, the contact 16 is connected to the conductor 13 and the stud 10 is connected.
Is inserted into the flange 7a and tightened with the nut 11a.

As described above, the insulating spacer 8 and the flange 9
Since the ring 20 is provided between the insulating spacer 8 and the grounding metal container 7, the insulating spacer 8 is maintained in a state of being tightened from both sides by the flange 9a and the metal flange 20. For this reason, it is not necessary to lower the gas pressure of the insulating gas in the grounded metal container 9, and the processing time involved in the processing of this reduction can be eliminated, and the overall operation time can be reduced.

Further, when the ground metal container 7 and the ground metal container 8 are separated and connected, the flange 7a does not directly contact the insulating spacer 8a, but the metal surfaces contact each other via the ring 20. Therefore, damage to the flange portion FS of the insulating spacer 20 can be prevented.

[3. Third Embodiment] [3-1. Configuration] An embodiment corresponding to the invention described in claim 4 will be described as a third embodiment with reference to FIG. FIG. 7 is a cross-sectional view illustrating a configuration of a connection unit 80 used in the gas insulated switchgear according to the third embodiment. As shown in the figure, in the present embodiment, the flange 7a of the grounded metal container 7, the ring 20, the insulating spacer 8, and the flange 9a of the grounded metal container 9 are connected to bolts 37, 38.
It is configured to be tightened.

[3-2. Operation and Effect] In the third embodiment having the above-described configuration, separate bolts 37 and 38 are attached to the flange 7a side and the flange 9a side. It can be easily divided by removing it. Therefore, the divided part can be clearly seen from the outside,
Workability at the time of division can be improved.

[4. Fourth Embodiment] [4-1. Configuration] An embodiment corresponding to the invention described in claim 5 will be described as a fourth embodiment with reference to FIGS. FIG. 8 is a cross-sectional view illustrating a configuration of a connection unit 80 used in the gas insulated switchgear according to the fourth embodiment.

This embodiment shows a case where one of the flanges is formed by the inner flange 39 in the connecting portion 80 shown in FIGS. In this case, a hole H for inserting the bolt 40 is formed in the ring 20g,
A bolt 40 is screwed from the hole H to the inner flange 39 through the insulating spacer 8i. This bolt 4
By 0, the insulating spacer 8i and the inner flange 39 are fixed. The outer flange 41 and the ring 20g are fixed by bolts 41.

FIG. 9 shows how the bolts 40 and 42 are arranged. As shown in the figure, the bolts 40, 40, ... and the bolts 42, 42, ... are arranged on different circumferences, and the bolts 42, 42, ... are located on the outer circumference of the bolts 40, 40,. Are located in

[4-2. Operation and Effect] In the fourth embodiment having the above configuration, the following operation and effect can be obtained. That is, when the outer flange 41 is removed at the time of inspection or accident, only the bolt 42 needs to be removed, and workability is improved. Also, the bolts 42, 42,.
, And the bolts 40, 40,... Are arranged on different circumferences, so that they are easy to visually recognize at the time of removal.

[4-3. Other Configuration Examples] As shown in FIG. 10, the bolts 40, 40,.
May be alternately arranged on the same circumference (claim 6). With such a configuration, the entire configuration can be reduced.

[5. Fifth Embodiment] [5-1. Configuration] An embodiment corresponding to the invention described in claim 7 will be described as a fifth embodiment with reference to FIGS. FIG. 11 is a cross-sectional view illustrating a coupling structure between devices of a gas insulated switchgear according to a fifth embodiment;
FIG. 12 is a side view of the arrow CC ′ shown in FIG.

In the present embodiment, the screw 5 is attached to the ring 20.
4, 54 are provided at two places. These screws 54, 54
Are arranged at positions facing each other across the center of the ring 20, as shown in FIG. Then, as shown in FIG. 12, a connection jig 52 extending from the ring 20 to the center is
Jig mounting bolts 53, 53 are screwed into the screws 54, 54 to be mounted.
The two connecting jigs 52 are mounted so as to be aligned on the same straight line.
The center of 0 is opened substantially by the size of the conductor 14. That is, as shown in FIG. 11, the conductor 13 can pass between these connection jigs 52,52.

[5-2. Operation and Effect] In the fifth embodiment having the above configuration, the following operation and effect can be obtained. That is, when connecting the ground metal containers 7 and 9, the connecting jigs 52 are attached to the ring 20 by the jig attaching bolts 53. At this time, the two connection jigs 52 are mounted so as to face each other toward the center of the ring 20. As a result, the opening between the connecting jigs 52, 52 connects the contact 16 to the conductor 1.
3 serves as a guide when connecting.

Then, while the contact 16 is being connected to the conductor 13 and before the ring 20 and the flange 7a are in contact with each other, the jig mounting bolts 53 are removed and the connection jigs 52, 52 are removed. Remove. Thereafter, the ring 20 and the flange 7a are connected. Thus, the connection jig 5 serving as a guide for connecting the contact 16 to the conductor 13 is provided.
By attaching the conductors 2 and 52, the eccentricity of the conductor 13 can be prevented, and a large eccentric load can be prevented from being applied to the insulating spacer 20.

[6. Sixth Embodiment] [6-1. Structure] An embodiment corresponding to the invention described in claim 8 will be described as a sixth embodiment with reference to FIGS. FIG. 13 is a cross-sectional view showing a coupling structure between devices of a gas insulated switchgear according to a sixth embodiment;
FIG. 14 is a DD ′ side view shown in FIG.

In the present embodiment, in the ring 20,
Jig mounting holes 56, 56 are provided instead of the screws 54, 54 of the above-described fifth embodiment. Also,
The connection jig 52 is provided with projections 55a, 55a,... Inserted into the jig mounting holes 56, 56. As shown in FIG. 14, two projections 55a are provided on each connection jig 52, respectively.

[6-2. Operation and Effect] In the sixth embodiment having the above configuration, the following operation and effect can be obtained. That is, when connecting the ground metal containers 7, 9, the projections 55a, 55 of the connection jigs 55, 55 are used.
are inserted into the jig mounting holes 56, 56,... of the ring 20 to connect the connection jigs 55, 55 to the ring 2.
Attach to 0. Thus, similarly to the fifth embodiment, the connection jigs 55 and 55 can be used as a guide for connecting the contact 16 to the conductor 13, preventing eccentricity of the conductor 13 and insulating spacers. 20 can be prevented from a large unbalanced load.

[7. Seventh Embodiment] [7-1. Configuration] An embodiment corresponding to the ninth and tenth aspects of the present invention is described as a seventh embodiment in FIG.
It will be described according to. FIG. 15 is a side view showing the configuration of the gas insulated switchgear according to the seventh embodiment. In the present embodiment, the ring 20 shown in each of the above embodiments is used.
Is used for a single-bus type gas insulated switchgear.

First, as shown in FIG. 15, the bus-side disconnector / grounding switch 6 combined with the lower outlet 1b of the circuit breaker 1
A ring 20 is provided at the connection portion with. conventionally,
An insulating spacer 8 is fixed between the flange 1c of the lower outlet 1b of the circuit breaker 1 and the flange 6a of the bus-side disconnector / grounding switch 6 so as to be sandwiched between the flange 1c and the flange 6a. Was. In the present embodiment, a ring 20 is provided between the insulating spacer 8 and the flange 1c of the lower outlet 1b of the circuit breaker 1.
The ring 20 is fixed to the insulating spacer 8 by, for example, bolts and screws (not shown), and is fastened by nuts together with the flanges 1c and 6a and the insulating spacer 8 via studs (not shown). Or,
It is tightened by bolts (not shown).

As shown in FIG. 15, a ring 20 is also provided between the line-side bus 4 on the line side and the cable head 5. Conventionally, the flange 4a of the track side bus 4
An insulating spacer 8g is fixed between the flange 4a and the flange 5a of the ground metal container of the cable head 5 so as to be sandwiched between the flange 4a and the flange 5a.
In the present embodiment, a ring 20 is provided between the insulating spacer 8g and the flange 5a of the grounded metal container of the cable head 5. The ring 20 is fixed to the insulating spacer 8g by, for example, bolts and screws (not shown), and is connected to the flange 4 via studs (not shown).
a, 5a and the insulating spacer 8g together with a nut or with a bolt (not shown).

[7-2. Operation and Effect] In the seventh embodiment having the above configuration, the following operation and effect can be obtained. That is, when the circuit breaker 1 is removed, for example, at the time of inspection of the circuit breaker 1 or at the time of an accident, the insulating spacer 8 is fixed to the flange 6 a of the bus-side disconnector / grounding switch 6 by the ring 20. I have. That is, the state in which the insulating spacer 8 is tightened from both sides by the flange 6a and the ring 20 is maintained. For this reason, there is no need to lower the gas pressure in the bus-side disconnector / ground switch 6. Therefore, the processing time associated with the reduction of the gas pressure of the bus-side disconnector / grounding switch 6 becomes unnecessary. Further, by setting the grounding switch 6b to the closed state, the circuit breaker 1 can be removed, and the work can be performed without stopping the main bus 13 of the bus-side disconnector / grounding switch 6. For this reason, work efficiency can be improved.

On the other hand, when the grounding metal container of the cable head 5 is removed for connection work of the cable head 5 or the like, the insulating spacer 8g is fixed to the flange 4a by the ring 20. That is, the insulating spacer 8g
Is maintained from both sides by the flange 4a and the ring 20. For this reason, it is not necessary to lower the gas pressure in the track side bus 4. Accordingly, the processing time associated with the decrease in the gas pressure in the line-side bus 4 becomes unnecessary, and the range in which the gas pressure is reduced can be minimized, so that the working efficiency can be improved.

[8. Eighth Embodiment] [8-1. Configuration] An embodiment corresponding to the invention described in claim 11 will be described as an eighth embodiment with reference to FIG. FIG. 16 is a side view showing the configuration of the gas insulated switchgear according to the eighth embodiment.

In the present embodiment, as shown in FIG. 6, a ring having the same configuration as the above-described ring 20 is provided between the combined line-side disconnector / ground switch 3 and the cable head 5. 20f is provided. A flange 3a is provided at an end on the cable head 5 side of the disconnector / grounding switch 3 shown in the figure, and an insulating spacer 8h is attached to the flange 3a. And the ring 20
f is fixed to the insulating spacer 8h. Also, the end of the cable head 5 on the disconnector / ground switch 3 side is
A flange 5a is provided and is connected to the ring 20f.

[8-2. Operation and Effect] In the eighth embodiment having the above configuration, the following operation and effect can be obtained. That is, when the ground metal container of the cable head 5 is removed for connection work of the cable head 5 or the like, the insulating spacer 8h is fixed to the flange 3a by the ring 20f. That is, the state in which the insulating spacer 8h is tightened from both sides by the flange 3a and the ring 20f is maintained. For this reason,
There is no need to lower the gas pressure in the disconnector / ground switch 3. Therefore, in the case of the connection work of the cable head 5, for example, the processing time accompanying the decrease in the gas pressure can be minimized, and the range in which the gas pressure is reduced can be minimized, so that the working efficiency can be improved. it can.

[9. Ninth Embodiment] [9-1. Configuration] An embodiment corresponding to the twelfth aspect of the present invention will be described as a ninth embodiment with reference to FIGS. FIG. 17 is a partial sectional view showing the configuration of the gas-insulated switchgear according to the ninth embodiment.
FIG. 2 is a single-line diagram of the gas-insulated switchgear. In the present embodiment, a ring 20 similar to ring 20 described above is used.
a and 20b are used in a three-phase bus type gas insulated switchgear.

As shown in FIG. 18, the bus disconnector 25 shown in FIG. 17 is used for the line A, and the bus disconnector 26 is used for the line B. Further, in this embodiment, as shown in FIG. 17, a three-phase bus grounding metal container 24 connecting line A and line B is provided, and conductor 27 is arranged in grounding metal container 24. ing.

Further, the ground metal container 2 of the bus-side disconnector 25
4 is provided with a flange 25a at the connection portion.
The insulating spacer 8a is attached to the flange 25a. A ring 20a is provided between the insulating spacer 8a and the ground metal container 24. Further, a flange 26a is provided at a connection portion of the busbar side disconnector 26 with the ground metal container 24, and the flange 26a is provided.
An insulating spacer 8b is attached to 6a. A ring 20b is also provided between the insulating spacer 8b and the ground metal container 24. That is, a ring 20 is provided at both ends of the grounded metal container 24 between the lines A and B.
a, 20b are provided.

[9-2. Operation and Effect] In the ninth embodiment having the above configuration, the following operation and effect can be obtained. That is, for example, when an accident occurs at the point C shown in FIG.
It becomes an operation state of only 01. Therefore, all the disconnectors on the side of the maiden bus 101 are in an open circuit state, and are in a single bus state,
An unstable state occurs on the power equipment. For this reason, it is necessary to remove the bus-side disconnector 25 of the line A and restore the second bus 101 in a short time. This restoration work must be performed in a short time.

First, the bus-side disconnector 25, the ground metal container 24, and the conductor 27 shown in FIG. 17 are removed. That is,
The grounding metal container 24 is removed from the busbar side disconnector 26. At this time, the state in which the insulating spacer 8b of the busbar disconnector 26 is tightened from both sides by the flange 26a and the ring 20b is maintained. Therefore, there is no need to reduce the gas pressure in the bus-side disconnector 26 of the line B. Therefore,
The processing time associated with the decrease in the gas pressure in the bus-side disconnector 26 of the line B is not required, so that the gas processing time when responding to an accident can be greatly reduced, and the working efficiency can be improved.

Also, when the bus-side disconnector 26 of the line B is removed due to an accident or the like, similarly, the state in which the insulating spacer 8a is fastened from both sides by the flange 25a and the ring 20a is maintained. Therefore, similarly, the gas processing time can be shortened and the working efficiency can be improved.

[10. Tenth embodiment] [10-1. Configuration] An embodiment corresponding to the inventions of claims 13 and 15 will be described as a tenth embodiment with reference to FIGS. FIG.
It is a fragmentary sectional view showing the composition of the gas insulated switchgear by an embodiment. In the gas insulated switchgear according to the present embodiment, the bus-side disconnector 25 is used for the line A shown in FIG.

In the present embodiment, as shown in FIG.
A detachable bus 28 connecting the line A and the line B is disposed between the bus-side disconnector 25 and the bus-side disconnector 26.
The detachable bus 28 has a bellows structure, and flanges 28a and 28b are provided at both ends. Also,
A flange 25a is provided at a connection portion of the bus-side disconnector 25 with the detachable bus 28, and an insulating spacer 8c is attached to the flange 25a. The insulating spacer 8c is fastened to the flange 28a of the detachable busbar 28.

A flange 26a is provided at a connection portion of the bus-side disconnector 26 with the detachable bus 28, and an insulating spacer 8d is attached to the flange 26a. A ring 20c having the same configuration as the above-described ring 20 is provided between the insulating spacer 8d and the flange 28b of the detachable busbar 28. That is, in the detachable bus 28 between the lines A and B, the flange 2
The ring 20c is provided only on the 1c side. The ring 20c may be provided on the flange 28b side.

[10-2. Operation and Effect] In the tenth embodiment having the above configuration, the following operation and effect can be obtained. That is, for example, when it is necessary to remove the bus-side disconnector 25 of the line A due to an accident or the like,
The bus-side disconnector 25 is attached and detached together with the insulating spacer 8c.
Remove from 8. At this time, the insulating spacer 8d of the bus-side disconnector 26 is maintained in a state of being tightened from both sides by the flange 26a and the ring 20c. Therefore, there is no need to reduce the gas pressure in the bus-side disconnector 26 of the line B.

On the other hand, when it is necessary to remove the bus-side disconnector 26 of the line B due to an accident or the like, the bus-side disconnector 26 is removed from the detachable bus 28 together with the insulating spacer 8d. At this time, the insulating spacer 8c of the bus-side disconnector 25 is formed by the flange 25a and the flange 28a of the detachable bus 28.
The state of being tightened from both sides is maintained. Therefore, there is no need to reduce the gas pressure in the bus-side disconnector 25 of the line A.

As described above, the bus-side disconnector 25 of the line A
Alternatively, even if any of the bus-side disconnectors 26 of the line B is removed, there is no need to reduce the gas pressure in the other bus-side disconnectors 25 and 26, so that the processing time associated with the reduction of the gas pressure is unnecessary. Become. Therefore, it is possible to greatly shorten the gas processing time at the time of handling an accident, and to improve the working efficiency.

When the bus disconnector 26 of the line B is removed as described above, the end processing of the bus disconnector 25 of the line A is performed as shown in FIG. First, an end ball 33 for end is attached to the end of the three-phase bus of the bus-side disconnector 25. Thereafter, a flat plate 34 is attached to the opening of the detachable bus 28, and an insulating gas is sealed therein. Thereby, the end processing of the bus-side disconnector 25 of the line A becomes possible, and the operation can be completed only by the gas processing in the detachable bus 28. Therefore, the processing time for the restoration work of the bus-side disconnector 25 can be minimized, the stop time of the electric station can be reduced, and the work efficiency can be improved.

[11. Eleventh Embodiment] [11-1. Configuration] An embodiment corresponding to the inventions of claims 14 and 15 will be described as an eleventh embodiment with reference to FIGS. 21 and 22. FIG. FIG.
It is a fragmentary sectional view showing the composition of the gas insulated switchgear by an embodiment.

In the present embodiment, the bus-side disconnector 30 is used for the instep bus shown in FIG. 18, and the bus-side disconnector 31 is used for the second bus. A detachable bus 29 is arranged between the instep bus and the second bus. The detachable bus 29 is provided with flanges 29a and 29b at both ends. Further, a flange 30a is provided at a connection portion of the bus-side disconnector 30 with the detachable bus 28, and an insulating spacer 8f is attached to the flange 30a.
The insulating spacer 8f is to be fastened to the flange 29a of the detachable busbar 29.

Further, a flange 31a is provided at a connection portion of the bus-side disconnector 31 with the detachable bus 29, and an insulating spacer 8e is attached to the flange 31a. A ring 20d having the same configuration as the above-described ring 20 is provided between the insulating spacer 8e and the flange 29b of the detachable busbar 29. That is, the ring 20d is provided only on the flange 29c side in the detachable bus 29 of the instep bus and the second bus. The ring 20d may be provided on the flange 29b side.

[11-2. Operation and Effect] In the eleventh embodiment having the above configuration, the following operation and effect can be obtained. That is, for example, when it is necessary to remove the bus-side disconnector 30 of the instep bus due to an accident or the like,
The bus-side disconnector 30 is attached and detached together with the insulating spacer 8f.
Remove from 9. At this time, the state in which the insulating spacer 8e of the bus-side disconnector 31 is tightened from both sides by the flange 31b and the ring 20d is maintained. Therefore, there is no need to lower the gas pressure in the bus-side disconnector 31 of the maiden bus.

On the other hand, when it is necessary to remove the bus-side disconnector 31 of the second bus due to an accident or the like, the bus-side disconnector 31 is removed from the removable bus 29 together with the insulating spacer. At this time,
The insulating spacer 8d of the bus-side disconnector 30 is
a and the flange 29a of the attaching / detaching bus 29 maintain a state of being tightened from both sides. Therefore, there is no need to lower the gas pressure in the bus-side disconnector 30 of the instep bus.

As described above, the bus-side disconnector 30 of the instep bus
Alternatively, even if any of the bus-side disconnectors 31 of the Otsu bus is removed, there is no need to reduce the gas pressure in the other bus-side disconnectors 30, 31, so that the processing time associated with the reduction of the gas pressure is unnecessary. Become. Therefore, it is possible to greatly shorten the gas processing time at the time of handling an accident, and to improve the working efficiency.

When the bus-side disconnector 31 of the second bus is removed as described above, the end processing of the bus-side disconnector 30 of the instep bus is performed as shown in FIG. First, an end ball 35 for end processing is attached to the end of the three-phase bus of the bus-side disconnector 30. Thereafter, a flat plate 36 is attached to the opening of the detachable bus 29, and an insulating gas is sealed therein. Thus, the end processing of the bus-side disconnector 30 of the instep bus can be performed, and the operation can be completed only by the gas processing in the detachable bus 29. Therefore, the processing time of the restoration work of the bus-side disconnector 30 can be minimized, the stop time of the electric station can be reduced, and the work efficiency can be improved.

[12. Other Embodiments] The present invention is not limited to the above-described embodiments, and the embodiments can be freely modified. Therefore, the present invention also includes other embodiments as exemplified below. is there. For example, the position where the ring of the gas insulating device is provided is not limited to the above-described position, and may be a connection portion between other devices. In particular, it is more effective if provided at a place where there are many chances of disconnection during post-operation inspection or at a connection part where connection work occurs on site at the time of installation.

[0101]

As described above, in the gas insulating device according to the present invention, the ring is provided between any one of the flanges of the adjacent grounded metal containers and the insulating spacer.
Even when the other grounded metal container is cut off due to an accident or inspection, the insulating spacer can be fixed from both sides by the flange and the ring. Therefore, there is no need to lower the gas pressure in one grounded metal container,
The processing time associated with the decrease in the gas pressure can be eliminated. Therefore, the stop time of the electric substation can be minimized, and the range in which the gas pressure of the entire electric substation is reduced can be minimized, so that the working efficiency can be improved.

Further, when disconnecting and connecting the grounded metal container, the insulating spacer and the flange are not brought into direct contact with each other but through a ring, so that the insulating spacer can be prevented from being damaged. For this reason, reliability, quality, and safety can be improved.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams showing a configuration of a connecting portion 80 of a gas insulating device according to a first embodiment of the present invention, wherein FIG. 1A is a side view, and FIG. 1B is AA ′ of FIG. It is sectional drawing.

FIGS. 2A and 2B are diagrams showing a configuration of a ring 20 in the embodiment, wherein FIG. 2A is a side sectional view and FIG. 2B is a front sectional view.

FIG. 3 is a cross-sectional view showing a detailed configuration of a connection section 80 according to the embodiment.

FIG. 4 is a sectional view showing a coupling structure between devices of a gas insulated switchgear according to a second embodiment of the present invention.

FIG. 5 is a sectional view taken along line B-B 'in FIG.

FIG. 6 is a cross-sectional view showing a disconnected state of the device according to the embodiment.

FIG. 7 is a cross-sectional view illustrating a configuration of a connection section 80 of a gas insulated switchgear according to a third embodiment of the present invention.

FIG. 8 is a cross-sectional view illustrating a configuration of a connection section 80 of a gas insulated switchgear according to a fourth embodiment of the present invention.

FIG. 9 is a diagram showing an arrangement state of bolts 40 and 42 according to the embodiment.

FIG. 10 is a diagram showing another example of arrangement of the bolts 40 and 42 according to the embodiment.

FIG. 11 is a sectional view showing a coupling structure between devices of a gas insulated switchgear according to a fifth embodiment of the present invention.

FIG. 12 is a sectional view taken along line C-C 'in FIG.

FIG. 13 is a sectional view showing a coupling structure between devices of a gas insulated switchgear according to a sixth embodiment of the present invention.

14 is a sectional view taken along the line D-D 'in FIG.

FIG. 15 is a side view showing a configuration of a gas insulated switchgear according to a seventh embodiment of the present invention.

FIG. 16 is a side view showing a configuration of a gas insulated switchgear according to an eighth embodiment of the present invention.

FIG. 17 is a partial sectional view showing a configuration of a gas-insulated switchgear according to a ninth embodiment of the present invention.

FIG. 18 is a single-line diagram in the embodiment.

FIG. 19 is a partial sectional view showing a configuration of a gas insulated switchgear according to a tenth embodiment of the present invention.

FIG. 20 is a partial cross-sectional view showing a state at the time of end processing in the embodiment.

FIG. 21 is a partial sectional view showing a configuration of a gas insulated switchgear according to an eleventh embodiment of the present invention.

FIG. 22 is a partial cross-sectional view showing a state at the time of end processing in the embodiment.

FIG. 23 is a side view showing one ordinance of a conventional gas insulated switchgear.

FIG. 24 is a side view showing a configuration of a connection section 80 between respective devices in a conventional gas insulated switchgear.

FIG. 25 is a cross-sectional view showing details of a connection unit 80 shown in FIG. 24;

26 is a cross-sectional view showing a coupling structure between devices including the connection unit 80 shown in FIG. 25.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Circuit breaker 1c, 4a, 5a, 6a ... Flange 4 ... Line side bus bar 5 ... Cable head 6 ... Bus line side disconnector / ground switch 7, 9 ... Ground metal container 7a, 9a ... Flange 8 ... Insulation spacer 10 ... Studs 11a, 11b Nuts 12a to 12c O-rings 13, 14 Conductors 16 Contactors 18 Insulating gas 20 Rings 21 Temporary tightening bolts 22 Temporary tightening screws 23, 54 Screws 24 Grounding Metal container 25, 26, 30, 31 ... busbar side disconnector 33 ... end ball 34 ... flat plate 37, 38, 40, 41, 42, 51 ... bolt 39 ... inner flange 40 ... outer flange 52, 55 ... connection jig 53: Fixing bolt 55a: Projection 80: Connection

Claims (15)

[Claims] 1. A gas which insulates and supports a high-voltage conductor by inserting a high-voltage conductor into a grounded metal container having an insulating gas sealed therein, and arranging insulating spacers between flanges of the grounded metal containers. A gas insulated switchgear, wherein a ring is provided between one of the flanges of the adjacent metal ground container and the insulating spacer. 2. A flange of the one grounded metal container,
The ring, the insulating spacer, and the flange of the other grounded metal container adjacent to the one grounded metal container were overlapped, studs were inserted near their outer periphery, and both ends of the studs were fastened with nuts. The gas insulated switchgear according to claim 1, wherein 3. A flange of the one grounded metal container,
The ring, the insulating spacer, and the flange of the other grounded metal container adjacent to the one grounded metal container are overlapped, a plurality of studs are inserted in the vicinity of the outer periphery thereof, and both ends of each of the studs are tightened with nuts. 2. The bolt according to claim 1, wherein the ring, the insulating spacer, and the flange of the other grounded metal container are fastened by bolts from the flange side of the other grounded metal container near the outer periphery thereof. Gas insulated switchgear. 4. A flange of the one grounded metal container,
The ring, the insulating spacer, and the flange of the other grounded metal container adjacent to the one grounded metal container are overlapped, and in the vicinity of the outer periphery thereof, the bolts are tightened from the two flange sides, respectively. The gas insulated switchgear according to claim 1, wherein 5. When the flange of the one grounded metal container forms an outer flange and the flange of the other grounded metal container forms an inner flange, the ring, the insulating spacer, and the inner flange are bolted. The gas-insulated switchgear according to claim 1, wherein the ring is tightened with another bolt from the outer flange side. 6. A bolt for tightening the outer flange and the ring along the outer periphery of the outer flange, the ring, the insulating spacer, and the inner flange, and the ring, the insulating spacer, and the inner flange. 6. The gas insulated switchgear according to claim 5, wherein the tightening bolts are alternately arranged on the same circumference. 7. The high-voltage conductor in the one ground metal container and the other ground when connecting the ring to the ring again after disconnecting the one ground metal container and the other ground metal container. A connection jig serving as a guide for connecting the high-voltage conductor of the metal container is detachably mounted, and the high-voltage conductor of the one grounded metal container can pass through the connection jig. The gas insulated switchgear according to any one of claims 1 to 6, wherein the gas insulated switchgear is configured to have an opening having a size. 8. A projection is provided on the connection jig,
The ring is provided with a jig mounting hole into which the protrusion of the connection jig is inserted, and the connection jig is fixed by inserting the protrusion into the jig mounting hole. The gas insulated switchgear according to claim 7, characterized in that: 9. A gas-insulated switchgear in which a circuit breaker and a bus-side disconnector are connected, wherein a flange of the grounded metal container of the circuit breaker, and a flange of the grounded metal container of the busbar-side disconnector. The said insulating spacer is arrange | positioned between the said, and the said ring was provided between the said flange of the said circuit breaker side, and the said insulating spacer, The Claim 1 characterized by the above-mentioned. Gas insulated switchgear. 10. A gas insulated switchgear having a bus bar and a cable head connected thereto, wherein the insulating spacer is provided between a flange of the ground metal container of the bus bar and a flange of the ground metal container of the cable head. The gas insulated switchgear according to any one of claims 1 to 8, wherein a ring is provided between the flange of the cable head and the insulating spacer. 11. A gas-insulated switchgear in which a line-side disconnector and a grounding switch are combined, and the combined line-side disconnector / grounding switch is connected to a cable head. The insulating spacer is disposed between the flange of the grounded metal container of the far-side disconnector / grounding switch and the flange of the grounded metal container of the cable head.
The gas insulated switchgear according to any one of claims 1 to 8, wherein the ring is provided between the flange of the cable head and the insulating spacer. 12. A circuit having at least two lines, comprising a first bus-side disconnector on a first line side and a second bus-side disconnector on a second line side. A gas-insulated switchgear, wherein a bus is disposed between the flange of the grounded metal container of the first busbar-side disconnector, the grounded metal container of the busbar, and the second busbar side. The insulating spacers are respectively disposed between the flange of the grounding metal container of the disconnector and the grounding metal container of the bus bar, and each of the insulating spacers and both ends of the grounding metal container of the busbar are disposed. The gas-insulated switchgear according to any one of claims 1 to 8, wherein the rings are respectively provided between the rings. 13. A circuit having at least two lines, comprising a first bus-side disconnector on a first line side, and a second bus-side disconnector on a second line side. A gas-insulated switchgear in which a detachable bus having a bellows structure is disposed, between a flange of the grounded metal container of the first bus-side disconnector and a flange at one end of the detachable bus, and The insulating spacers are respectively disposed between a flange of the grounded metal container of the second busbar side disconnector and a flange at the other end of the detachable busbar, and one of the insulating spacers is provided. The gas insulated switchgear according to any one of claims 1 to 8, wherein the ring is provided between the flange and an end of the detachable bus bar and the flange. 14. A double-bus system, comprising a first bus-side disconnector on a first bus side, and a second bus-side disconnector on a second bus side, between the two buses. A gas-insulated switchgear in which a detachable bus having a bellows structure is arranged, between a flange of the grounded metal container of the first bus-side disconnector, and a flange at one end of the detachable bus, and Between the flange of the grounded metal container of the second busbar-side disconnector and the flange at the other end of the detachable busbar, the insulating spacers are respectively disposed, and any one of the insulating spacers The gas insulated switchgear according to any one of claims 1 to 8, wherein the ring is provided between an end of the detachable bus bar and a flange. 15. When one of the first bus-side disconnector and the second bus-side disconnector is removed,
A flat plate is attached to the opening of the detachable bus, and the inside of the detachable bus is used as a tank for performing an end process of the other bus of the first bus disconnector or the second bus disconnector. The gas insulated switchgear according to claim 13, wherein the gas insulated switchgear is configured to perform the operation.